Home / 20,681.30-28,530.96-13,964.78

Finding the Fourth Proportional to 20,681.30, 28,530.96 and 13,964.78

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Solution

The fourth proportional to 20,681.30, 28,530.96 and 13,964.78 is: 19,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.30 : 28,530.96 = 13,964.78 : x
  2. Step 2: Convert to fraction form
    20,681.30/28,530.96 = 13,964.78/x
  3. Step 3: Cross multiply
    20,681.30x = 28,530.96 × 13,964.78
  4. Step 4: Simplify right side
    20,681.30x = 398,428,579.59
  5. Step 5: Solve for x
    x = 398,428,579.59/20,681.30
  6. Step 6: Final answer
    x = 19,265.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.