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Finding the Fourth Proportional to 29,378.80, 40,543.06 and 15,950.20

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Solution

The fourth proportional to 29,378.80, 40,543.06 and 15,950.20 is: 22,011.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,378.80 : 40,543.06 = 15,950.20 : x
  2. Step 2: Convert to fraction form
    29,378.80/40,543.06 = 15,950.20/x
  3. Step 3: Cross multiply
    29,378.80x = 40,543.06 × 15,950.20
  4. Step 4: Simplify right side
    29,378.80x = 646,669,915.61
  5. Step 5: Solve for x
    x = 646,669,915.61/29,378.80
  6. Step 6: Final answer
    x = 22,011.45

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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.