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Finding the Fourth Proportional to 58,420.60, 87,634.04 and 18,974.80

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Solution

The fourth proportional to 58,420.60, 87,634.04 and 18,974.80 is: 28,463.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,420.60 : 87,634.04 = 18,974.80 : x
  2. Step 2: Convert to fraction form
    58,420.60/87,634.04 = 18,974.80/x
  3. Step 3: Cross multiply
    58,420.60x = 87,634.04 × 18,974.80
  4. Step 4: Simplify right side
    58,420.60x = 1,662,838,382.19
  5. Step 5: Solve for x
    x = 1,662,838,382.19/58,420.60
  6. Step 6: Final answer
    x = 28,463.22

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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.