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Finding the Fourth Proportional to 15,651.20, 21,598.08 and 9,363.20

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Solution

The fourth proportional to 15,651.20, 21,598.08 and 9,363.20 is: 12,920.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,651.20 : 21,598.08 = 9,363.20 : x
  2. Step 2: Convert to fraction form
    15,651.20/21,598.08 = 9,363.20/x
  3. Step 3: Cross multiply
    15,651.20x = 21,598.08 × 9,363.20
  4. Step 4: Simplify right side
    15,651.20x = 202,227,142.66
  5. Step 5: Solve for x
    x = 202,227,142.66/15,651.20
  6. Step 6: Final answer
    x = 12,920.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.