Home / 20,719.46-28,577.40-13,159.28

Finding the Fourth Proportional to 20,719.46, 28,577.40 and 13,159.28

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Solution

The fourth proportional to 20,719.46, 28,577.40 and 13,159.28 is: 18,149.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.46 : 28,577.40 = 13,159.28 : x
  2. Step 2: Convert to fraction form
    20,719.46/28,577.40 = 13,159.28/x
  3. Step 3: Cross multiply
    20,719.46x = 28,577.40 × 13,159.28
  4. Step 4: Simplify right side
    20,719.46x = 376,058,008.27
  5. Step 5: Solve for x
    x = 376,058,008.27/20,719.46
  6. Step 6: Final answer
    x = 18,149.99

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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.