Home / 28,151.47-38,849.49-15,405.76

Finding the Fourth Proportional to 28,151.47, 38,849.49 and 15,405.76

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Solution

The fourth proportional to 28,151.47, 38,849.49 and 15,405.76 is: 21,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,151.47 : 38,849.49 = 15,405.76 : x
  2. Step 2: Convert to fraction form
    28,151.47/38,849.49 = 15,405.76/x
  3. Step 3: Cross multiply
    28,151.47x = 38,849.49 × 15,405.76
  4. Step 4: Simplify right side
    28,151.47x = 598,505,919.06
  5. Step 5: Solve for x
    x = 598,505,919.06/28,151.47
  6. Step 6: Final answer
    x = 21,260.20

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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.