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Finding the Fourth Proportional to 34,391.64, 47,468.90 and 20,970.29

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Solution

The fourth proportional to 34,391.64, 47,468.90 and 20,970.29 is: 28,944.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,391.64 : 47,468.90 = 20,970.29 : x
  2. Step 2: Convert to fraction form
    34,391.64/47,468.90 = 20,970.29/x
  3. Step 3: Cross multiply
    34,391.64x = 47,468.90 × 20,970.29
  4. Step 4: Simplify right side
    34,391.64x = 995,436,256.79
  5. Step 5: Solve for x
    x = 995,436,256.79/34,391.64
  6. Step 6: Final answer
    x = 28,944.13

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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.