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Finding the Fourth Proportional to 12,287.10, 18,430.65 and 7,086.90

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Solution

The fourth proportional to 12,287.10, 18,430.65 and 7,086.90 is: 10,630.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.10 : 18,430.65 = 7,086.90 : x
  2. Step 2: Convert to fraction form
    12,287.10/18,430.65 = 7,086.90/x
  3. Step 3: Cross multiply
    12,287.10x = 18,430.65 × 7,086.90
  4. Step 4: Simplify right side
    12,287.10x = 130,616,173.49
  5. Step 5: Solve for x
    x = 130,616,173.49/12,287.10
  6. Step 6: Final answer
    x = 10,630.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.