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Finding the Fourth Proportional to 31,731.40, 47,555.10 and 16,908.40

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Solution

The fourth proportional to 31,731.40, 47,555.10 and 16,908.40 is: 25,340.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,731.40 : 47,555.10 = 16,908.40 : x
  2. Step 2: Convert to fraction form
    31,731.40/47,555.10 = 16,908.40/x
  3. Step 3: Cross multiply
    31,731.40x = 47,555.10 × 16,908.40
  4. Step 4: Simplify right side
    31,731.40x = 804,080,652.84
  5. Step 5: Solve for x
    x = 804,080,652.84/31,731.40
  6. Step 6: Final answer
    x = 25,340.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.