Home / 20,417,121.90-28,177,613.91-15,251,515.38

Finding the Fourth Proportional to 20,417,121.90, 28,177,613.91 and 15,251,515.38

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Solution

The fourth proportional to 20,417,121.90, 28,177,613.91 and 15,251,515.38 is: 21,048,574.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417,121.90 : 28,177,613.91 = 15,251,515.38 : x
  2. Step 2: Convert to fraction form
    20,417,121.90/28,177,613.91 = 15,251,515.38/x
  3. Step 3: Cross multiply
    20,417,121.90x = 28,177,613.91 × 15,251,515.38
  4. Step 4: Simplify right side
    20,417,121.90x = 429,751,311,920,066.94
  5. Step 5: Solve for x
    x = 429,751,311,920,066.94/20,417,121.90
  6. Step 6: Final answer
    x = 21,048,574.53

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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.