Home / 20,408.13-28,159.65-11,456.01

Finding the Fourth Proportional to 20,408.13, 28,159.65 and 11,456.01

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Solution

The fourth proportional to 20,408.13, 28,159.65 and 11,456.01 is: 15,807.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.13 : 28,159.65 = 11,456.01 : x
  2. Step 2: Convert to fraction form
    20,408.13/28,159.65 = 11,456.01/x
  3. Step 3: Cross multiply
    20,408.13x = 28,159.65 × 11,456.01
  4. Step 4: Simplify right side
    20,408.13x = 322,597,232.00
  5. Step 5: Solve for x
    x = 322,597,232.00/20,408.13
  6. Step 6: Final answer
    x = 15,807.29

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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.