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Finding the Fourth Proportional to 56,131.98, 84,169.80 and 18,678.84

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Solution

The fourth proportional to 56,131.98, 84,169.80 and 18,678.84 is: 28,008.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,131.98 : 84,169.80 = 18,678.84 : x
  2. Step 2: Convert to fraction form
    56,131.98/84,169.80 = 18,678.84/x
  3. Step 3: Cross multiply
    56,131.98x = 84,169.80 × 18,678.84
  4. Step 4: Simplify right side
    56,131.98x = 1,572,194,227.03
  5. Step 5: Solve for x
    x = 1,572,194,227.03/56,131.98
  6. Step 6: Final answer
    x = 28,008.89

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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.