Home / 20,356.57-28,073.28-13,971.90

Finding the Fourth Proportional to 20,356.57, 28,073.28 and 13,971.90

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Solution

The fourth proportional to 20,356.57, 28,073.28 and 13,971.90 is: 19,268.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.57 : 28,073.28 = 13,971.90 : x
  2. Step 2: Convert to fraction form
    20,356.57/28,073.28 = 13,971.90/x
  3. Step 3: Cross multiply
    20,356.57x = 28,073.28 × 13,971.90
  4. Step 4: Simplify right side
    20,356.57x = 392,237,060.83
  5. Step 5: Solve for x
    x = 392,237,060.83/20,356.57
  6. Step 6: Final answer
    x = 19,268.33

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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.