Home / 20,559.12-28,371.68-11,127.68

Finding the Fourth Proportional to 20,559.12, 28,371.68 and 11,127.68

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Solution

The fourth proportional to 20,559.12, 28,371.68 and 11,127.68 is: 15,356.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.12 : 28,371.68 = 11,127.68 : x
  2. Step 2: Convert to fraction form
    20,559.12/28,371.68 = 11,127.68/x
  3. Step 3: Cross multiply
    20,559.12x = 28,371.68 × 11,127.68
  4. Step 4: Simplify right side
    20,559.12x = 315,710,976.10
  5. Step 5: Solve for x
    x = 315,710,976.10/20,559.12
  6. Step 6: Final answer
    x = 15,356.25

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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.