Home / 20,340.92-28,069.15-11,388.35

Finding the Fourth Proportional to 20,340.92, 28,069.15 and 11,388.35

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Solution

The fourth proportional to 20,340.92, 28,069.15 and 11,388.35 is: 15,715.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.92 : 28,069.15 = 11,388.35 : x
  2. Step 2: Convert to fraction form
    20,340.92/28,069.15 = 11,388.35/x
  3. Step 3: Cross multiply
    20,340.92x = 28,069.15 × 11,388.35
  4. Step 4: Simplify right side
    20,340.92x = 319,661,304.40
  5. Step 5: Solve for x
    x = 319,661,304.40/20,340.92
  6. Step 6: Final answer
    x = 15,715.18

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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.