Home / 19,009.90-28,514.85-18,880.30

Finding the Fourth Proportional to 19,009.90, 28,514.85 and 18,880.30

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Solution

The fourth proportional to 19,009.90, 28,514.85 and 18,880.30 is: 28,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.90 : 28,514.85 = 18,880.30 : x
  2. Step 2: Convert to fraction form
    19,009.90/28,514.85 = 18,880.30/x
  3. Step 3: Cross multiply
    19,009.90x = 28,514.85 × 18,880.30
  4. Step 4: Simplify right side
    19,009.90x = 538,368,922.46
  5. Step 5: Solve for x
    x = 538,368,922.46/19,009.90
  6. Step 6: Final answer
    x = 28,320.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.