Home / 20,681.64-31,010.69-14,115.78

Finding the Fourth Proportional to 20,681.64, 31,010.69 and 14,115.78

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Solution

The fourth proportional to 20,681.64, 31,010.69 and 14,115.78 is: 21,165.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.64 : 31,010.69 = 14,115.78 : x
  2. Step 2: Convert to fraction form
    20,681.64/31,010.69 = 14,115.78/x
  3. Step 3: Cross multiply
    20,681.64x = 31,010.69 × 14,115.78
  4. Step 4: Simplify right side
    20,681.64x = 437,740,077.69
  5. Step 5: Solve for x
    x = 437,740,077.69/20,681.64
  6. Step 6: Final answer
    x = 21,165.64

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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.