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Finding the Fourth Proportional to 15,151.50, 20,908.44 and 8,437.41

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Solution

The fourth proportional to 15,151.50, 20,908.44 and 8,437.41 is: 11,643.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.50 : 20,908.44 = 8,437.41 : x
  2. Step 2: Convert to fraction form
    15,151.50/20,908.44 = 8,437.41/x
  3. Step 3: Cross multiply
    15,151.50x = 20,908.44 × 8,437.41
  4. Step 4: Simplify right side
    15,151.50x = 176,413,080.74
  5. Step 5: Solve for x
    x = 176,413,080.74/15,151.50
  6. Step 6: Final answer
    x = 11,643.27

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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.