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Finding the Fourth Proportional to 56,008.78, 84,010.95 and 13,888.96

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Solution

The fourth proportional to 56,008.78, 84,010.95 and 13,888.96 is: 20,832.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,008.78 : 84,010.95 = 13,888.96 : x
  2. Step 2: Convert to fraction form
    56,008.78/84,010.95 = 13,888.96/x
  3. Step 3: Cross multiply
    56,008.78x = 84,010.95 × 13,888.96
  4. Step 4: Simplify right side
    56,008.78x = 1,166,824,724.11
  5. Step 5: Solve for x
    x = 1,166,824,724.11/56,008.78
  6. Step 6: Final answer
    x = 20,832.89

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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.