Home / 20,138.80-30,192.24-9,603.28

Finding the Fourth Proportional to 20,138.80, 30,192.24 and 9,603.28

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Solution

The fourth proportional to 20,138.80, 30,192.24 and 9,603.28 is: 14,397.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.80 : 30,192.24 = 9,603.28 : x
  2. Step 2: Convert to fraction form
    20,138.80/30,192.24 = 9,603.28/x
  3. Step 3: Cross multiply
    20,138.80x = 30,192.24 × 9,603.28
  4. Step 4: Simplify right side
    20,138.80x = 289,944,534.55
  5. Step 5: Solve for x
    x = 289,944,534.55/20,138.80
  6. Step 6: Final answer
    x = 14,397.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.