Home / 42,647.52-63,971.28-21,857.76

Finding the Fourth Proportional to 42,647.52, 63,971.28 and 21,857.76

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Solution

The fourth proportional to 42,647.52, 63,971.28 and 21,857.76 is: 32,786.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,647.52 : 63,971.28 = 21,857.76 : x
  2. Step 2: Convert to fraction form
    42,647.52/63,971.28 = 21,857.76/x
  3. Step 3: Cross multiply
    42,647.52x = 63,971.28 × 21,857.76
  4. Step 4: Simplify right side
    42,647.52x = 1,398,268,885.13
  5. Step 5: Solve for x
    x = 1,398,268,885.13/42,647.52
  6. Step 6: Final answer
    x = 32,786.64

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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.