Home / 18,722,428.80-28,083,643.20-15,321,206.40

Finding the Fourth Proportional to 18,722,428.80, 28,083,643.20 and 15,321,206.40

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Solution

The fourth proportional to 18,722,428.80, 28,083,643.20 and 15,321,206.40 is: 22,981,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722,428.80 : 28,083,643.20 = 15,321,206.40 : x
  2. Step 2: Convert to fraction form
    18,722,428.80/28,083,643.20 = 15,321,206.40/x
  3. Step 3: Cross multiply
    18,722,428.80x = 28,083,643.20 × 15,321,206.40
  4. Step 4: Simplify right side
    18,722,428.80x = 430,275,293,931,156.50
  5. Step 5: Solve for x
    x = 430,275,293,931,156.50/18,722,428.80
  6. Step 6: Final answer
    x = 22,981,809.60

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Similar ratio
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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.