Home / 20,681.14-31,009.94-14,115.28

Finding the Fourth Proportional to 20,681.14, 31,009.94 and 14,115.28

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Solution

The fourth proportional to 20,681.14, 31,009.94 and 14,115.28 is: 21,164.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.14 : 31,009.94 = 14,115.28 : x
  2. Step 2: Convert to fraction form
    20,681.14/31,009.94 = 14,115.28/x
  3. Step 3: Cross multiply
    20,681.14x = 31,009.94 × 14,115.28
  4. Step 4: Simplify right side
    20,681.14x = 437,713,985.88
  5. Step 5: Solve for x
    x = 437,713,985.88/20,681.14
  6. Step 6: Final answer
    x = 21,164.89

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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.