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Finding the Fourth Proportional to 57,957.48, 86,913.88 and 20,510.57

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Solution

The fourth proportional to 57,957.48, 86,913.88 and 20,510.57 is: 30,757.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,957.48 : 86,913.88 = 20,510.57 : x
  2. Step 2: Convert to fraction form
    57,957.48/86,913.88 = 20,510.57/x
  3. Step 3: Cross multiply
    57,957.48x = 86,913.88 × 20,510.57
  4. Step 4: Simplify right side
    57,957.48x = 1,782,653,219.71
  5. Step 5: Solve for x
    x = 1,782,653,219.71/57,957.48
  6. Step 6: Final answer
    x = 30,757.95

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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.