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Finding the Fourth Proportional to 18,802.30, 28,203.45 and 15,519.10

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Solution

The fourth proportional to 18,802.30, 28,203.45 and 15,519.10 is: 23,278.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.30 : 28,203.45 = 15,519.10 : x
  2. Step 2: Convert to fraction form
    18,802.30/28,203.45 = 15,519.10/x
  3. Step 3: Cross multiply
    18,802.30x = 28,203.45 × 15,519.10
  4. Step 4: Simplify right side
    18,802.30x = 437,692,160.90
  5. Step 5: Solve for x
    x = 437,692,160.90/18,802.30
  6. Step 6: Final answer
    x = 23,278.65

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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.