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Finding the Fourth Proportional to 51,471.90, 71,030.88 and 28,812.96

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Solution

The fourth proportional to 51,471.90, 71,030.88 and 28,812.96 is: 39,761.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,471.90 : 71,030.88 = 28,812.96 : x
  2. Step 2: Convert to fraction form
    51,471.90/71,030.88 = 28,812.96/x
  3. Step 3: Cross multiply
    51,471.90x = 71,030.88 × 28,812.96
  4. Step 4: Simplify right side
    51,471.90x = 2,046,609,904.20
  5. Step 5: Solve for x
    x = 2,046,609,904.20/51,471.90
  6. Step 6: Final answer
    x = 39,761.69

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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.