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Finding the Fourth Proportional to 58,318.70, 87,468.66 and 20,871.80

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Solution

The fourth proportional to 58,318.70, 87,468.66 and 20,871.80 is: 31,304.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,318.70 : 87,468.66 = 20,871.80 : x
  2. Step 2: Convert to fraction form
    58,318.70/87,468.66 = 20,871.80/x
  3. Step 3: Cross multiply
    58,318.70x = 87,468.66 × 20,871.80
  4. Step 4: Simplify right side
    58,318.70x = 1,825,628,377.79
  5. Step 5: Solve for x
    x = 1,825,628,377.79/58,318.70
  6. Step 6: Final answer
    x = 31,304.34

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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.