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Finding the Fourth Proportional to 18,892.80, 28,339.20 and 10,598.40

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Solution

The fourth proportional to 18,892.80, 28,339.20 and 10,598.40 is: 15,897.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,892.80 : 28,339.20 = 10,598.40 : x
  2. Step 2: Convert to fraction form
    18,892.80/28,339.20 = 10,598.40/x
  3. Step 3: Cross multiply
    18,892.80x = 28,339.20 × 10,598.40
  4. Step 4: Simplify right side
    18,892.80x = 300,350,177.28
  5. Step 5: Solve for x
    x = 300,350,177.28/18,892.80
  6. Step 6: Final answer
    x = 15,897.60

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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.