Home / 15,151.28-20,908.60-8,436.76

Finding the Fourth Proportional to 15,151.28, 20,908.60 and 8,436.76

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Solution

The fourth proportional to 15,151.28, 20,908.60 and 8,436.76 is: 11,642.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.28 : 20,908.60 = 8,436.76 : x
  2. Step 2: Convert to fraction form
    15,151.28/20,908.60 = 8,436.76/x
  3. Step 3: Cross multiply
    15,151.28x = 20,908.60 × 8,436.76
  4. Step 4: Simplify right side
    15,151.28x = 176,400,840.14
  5. Step 5: Solve for x
    x = 176,400,840.14/15,151.28
  6. Step 6: Final answer
    x = 11,642.64

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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.