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Finding the Fourth Proportional to 58,390.40, 87,585.54 and 18,947.52

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Solution

The fourth proportional to 58,390.40, 87,585.54 and 18,947.52 is: 28,421.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,390.40 : 87,585.54 = 18,947.52 : x
  2. Step 2: Convert to fraction form
    58,390.40/87,585.54 = 18,947.52/x
  3. Step 3: Cross multiply
    58,390.40x = 87,585.54 × 18,947.52
  4. Step 4: Simplify right side
    58,390.40x = 1,659,528,770.86
  5. Step 5: Solve for x
    x = 1,659,528,770.86/58,390.40
  6. Step 6: Final answer
    x = 28,421.26

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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.