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Finding the Fourth Proportional to 58,407.27, 87,615.15 and 20,971.90

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Solution

The fourth proportional to 58,407.27, 87,615.15 and 20,971.90 is: 31,459.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,407.27 : 87,615.15 = 20,971.90 : x
  2. Step 2: Convert to fraction form
    58,407.27/87,615.15 = 20,971.90/x
  3. Step 3: Cross multiply
    58,407.27x = 87,615.15 × 20,971.90
  4. Step 4: Simplify right side
    58,407.27x = 1,837,456,164.29
  5. Step 5: Solve for x
    x = 1,837,456,164.29/58,407.27
  6. Step 6: Final answer
    x = 31,459.37

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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.