Home / 20,559.13-28,371.60-11,127.70

Finding the Fourth Proportional to 20,559.13, 28,371.60 and 11,127.70

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Solution

The fourth proportional to 20,559.13, 28,371.60 and 11,127.70 is: 15,356.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.13 : 28,371.60 = 11,127.70 : x
  2. Step 2: Convert to fraction form
    20,559.13/28,371.60 = 11,127.70/x
  3. Step 3: Cross multiply
    20,559.13x = 28,371.60 × 11,127.70
  4. Step 4: Simplify right side
    20,559.13x = 315,710,653.32
  5. Step 5: Solve for x
    x = 315,710,653.32/20,559.13
  6. Step 6: Final answer
    x = 15,356.23

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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.