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Finding the Fourth Proportional to 58,391.74, 87,599.93 and 18,945.80

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Solution

The fourth proportional to 58,391.74, 87,599.93 and 18,945.80 is: 28,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,391.74 : 87,599.93 = 18,945.80 : x
  2. Step 2: Convert to fraction form
    58,391.74/87,599.93 = 18,945.80/x
  3. Step 3: Cross multiply
    58,391.74x = 87,599.93 × 18,945.80
  4. Step 4: Simplify right side
    58,391.74x = 1,659,650,656.14
  5. Step 5: Solve for x
    x = 1,659,650,656.14/58,391.74
  6. Step 6: Final answer
    x = 28,422.70

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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.