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Finding the Fourth Proportional to 56,279.69, 84,423.98 and 18,839.90

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Solution

The fourth proportional to 56,279.69, 84,423.98 and 18,839.90 is: 28,261.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,279.69 : 84,423.98 = 18,839.90 : x
  2. Step 2: Convert to fraction form
    56,279.69/84,423.98 = 18,839.90/x
  3. Step 3: Cross multiply
    56,279.69x = 84,423.98 × 18,839.90
  4. Step 4: Simplify right side
    56,279.69x = 1,590,539,246.60
  5. Step 5: Solve for x
    x = 1,590,539,246.60/56,279.69
  6. Step 6: Final answer
    x = 28,261.34

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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.