Home / 20,395.16-28,145.40-11,443.04

Finding the Fourth Proportional to 20,395.16, 28,145.40 and 11,443.04

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Solution

The fourth proportional to 20,395.16, 28,145.40 and 11,443.04 is: 15,791.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.16 : 28,145.40 = 11,443.04 : x
  2. Step 2: Convert to fraction form
    20,395.16/28,145.40 = 11,443.04/x
  3. Step 3: Cross multiply
    20,395.16x = 28,145.40 × 11,443.04
  4. Step 4: Simplify right side
    20,395.16x = 322,068,938.02
  5. Step 5: Solve for x
    x = 322,068,938.02/20,395.16
  6. Step 6: Final answer
    x = 15,791.44

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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.