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Finding the Fourth Proportional to 29,490.52, 40,700.64 and 16,915

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Solution

The fourth proportional to 29,490.52, 40,700.64 and 16,915 is: 23,344.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,490.52 : 40,700.64 = 16,915 : x
  2. Step 2: Convert to fraction form
    29,490.52/40,700.64 = 16,915/x
  3. Step 3: Cross multiply
    29,490.52x = 40,700.64 × 16,915
  4. Step 4: Simplify right side
    29,490.52x = 688,451,325.60
  5. Step 5: Solve for x
    x = 688,451,325.60/29,490.52
  6. Step 6: Final answer
    x = 23,344.84

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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.