Home / 28,451.76-42,681.68-15,121.28

Finding the Fourth Proportional to 28,451.76, 42,681.68 and 15,121.28

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Solution

The fourth proportional to 28,451.76, 42,681.68 and 15,121.28 is: 22,684.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,451.76 : 42,681.68 = 15,121.28 : x
  2. Step 2: Convert to fraction form
    28,451.76/42,681.68 = 15,121.28/x
  3. Step 3: Cross multiply
    28,451.76x = 42,681.68 × 15,121.28
  4. Step 4: Simplify right side
    28,451.76x = 645,401,634.15
  5. Step 5: Solve for x
    x = 645,401,634.15/28,451.76
  6. Step 6: Final answer
    x = 22,684.07

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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.