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Finding the Fourth Proportional to 18,432.90, 25,430.19 and 11,347.02

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Solution

The fourth proportional to 18,432.90, 25,430.19 and 11,347.02 is: 15,654.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,432.90 : 25,430.19 = 11,347.02 : x
  2. Step 2: Convert to fraction form
    18,432.90/25,430.19 = 11,347.02/x
  3. Step 3: Cross multiply
    18,432.90x = 25,430.19 × 11,347.02
  4. Step 4: Simplify right side
    18,432.90x = 288,556,874.53
  5. Step 5: Solve for x
    x = 288,556,874.53/18,432.90
  6. Step 6: Final answer
    x = 15,654.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.