Home / 20,663.85-28,513.58-13,964.07

Finding the Fourth Proportional to 20,663.85, 28,513.58 and 13,964.07

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Solution

The fourth proportional to 20,663.85, 28,513.58 and 13,964.07 is: 19,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.85 : 28,513.58 = 13,964.07 : x
  2. Step 2: Convert to fraction form
    20,663.85/28,513.58 = 13,964.07/x
  3. Step 3: Cross multiply
    20,663.85x = 28,513.58 × 13,964.07
  4. Step 4: Simplify right side
    20,663.85x = 398,165,557.25
  5. Step 5: Solve for x
    x = 398,165,557.25/20,663.85
  6. Step 6: Final answer
    x = 19,268.70

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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.