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Finding the Fourth Proportional to 58,663.71, 87,956.70 and 21,218.85

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Solution

The fourth proportional to 58,663.71, 87,956.70 and 21,218.85 is: 31,814.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,663.71 : 87,956.70 = 21,218.85 : x
  2. Step 2: Convert to fraction form
    58,663.71/87,956.70 = 21,218.85/x
  3. Step 3: Cross multiply
    58,663.71x = 87,956.70 × 21,218.85
  4. Step 4: Simplify right side
    58,663.71x = 1,866,340,406.98
  5. Step 5: Solve for x
    x = 1,866,340,406.98/58,663.71
  6. Step 6: Final answer
    x = 31,814.22

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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.