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Finding the Fourth Proportional to 29,290.52, 40,420.95 and 15,861.79

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Solution

The fourth proportional to 29,290.52, 40,420.95 and 15,861.79 is: 21,889.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,290.52 : 40,420.95 = 15,861.79 : x
  2. Step 2: Convert to fraction form
    29,290.52/40,420.95 = 15,861.79/x
  3. Step 3: Cross multiply
    29,290.52x = 40,420.95 × 15,861.79
  4. Step 4: Simplify right side
    29,290.52x = 641,148,620.50
  5. Step 5: Solve for x
    x = 641,148,620.50/29,290.52
  6. Step 6: Final answer
    x = 21,889.29

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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.