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Finding the Fourth Proportional to 10,402.40, 15,603.60 and 9,927.20

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Solution

The fourth proportional to 10,402.40, 15,603.60 and 9,927.20 is: 14,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,402.40 : 15,603.60 = 9,927.20 : x
  2. Step 2: Convert to fraction form
    10,402.40/15,603.60 = 9,927.20/x
  3. Step 3: Cross multiply
    10,402.40x = 15,603.60 × 9,927.20
  4. Step 4: Simplify right side
    10,402.40x = 154,900,057.92
  5. Step 5: Solve for x
    x = 154,900,057.92/10,402.40
  6. Step 6: Final answer
    x = 14,890.80

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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.