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Finding the Fourth Proportional to 58,421.44, 87,592.16 and 20,980.80

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Solution

The fourth proportional to 58,421.44, 87,592.16 and 20,980.80 is: 31,456.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,421.44 : 87,592.16 = 20,980.80 : x
  2. Step 2: Convert to fraction form
    58,421.44/87,592.16 = 20,980.80/x
  3. Step 3: Cross multiply
    58,421.44x = 87,592.16 × 20,980.80
  4. Step 4: Simplify right side
    58,421.44x = 1,837,753,590.53
  5. Step 5: Solve for x
    x = 1,837,753,590.53/58,421.44
  6. Step 6: Final answer
    x = 31,456.83

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1.5x scale

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.