Home / 20,347.96-28,079.42-11,395.02

Finding the Fourth Proportional to 20,347.96, 28,079.42 and 11,395.02

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Solution

The fourth proportional to 20,347.96, 28,079.42 and 11,395.02 is: 15,724.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.96 : 28,079.42 = 11,395.02 : x
  2. Step 2: Convert to fraction form
    20,347.96/28,079.42 = 11,395.02/x
  3. Step 3: Cross multiply
    20,347.96x = 28,079.42 × 11,395.02
  4. Step 4: Simplify right side
    20,347.96x = 319,965,552.49
  5. Step 5: Solve for x
    x = 319,965,552.49/20,347.96
  6. Step 6: Final answer
    x = 15,724.70

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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.