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Finding the Fourth Proportional to 58,588.79, 87,861.98 and 21,138.78

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Solution

The fourth proportional to 58,588.79, 87,861.98 and 21,138.78 is: 31,700.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,588.79 : 87,861.98 = 21,138.78 : x
  2. Step 2: Convert to fraction form
    58,588.79/87,861.98 = 21,138.78/x
  3. Step 3: Cross multiply
    58,588.79x = 87,861.98 × 21,138.78
  4. Step 4: Simplify right side
    58,588.79x = 1,857,294,959.89
  5. Step 5: Solve for x
    x = 1,857,294,959.89/58,588.79
  6. Step 6: Final answer
    x = 31,700.52

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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.