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Finding the Fourth Proportional to 15,722.71, 21,697.76 and 8,553.11

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Solution

The fourth proportional to 15,722.71, 21,697.76 and 8,553.11 is: 11,803.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,722.71 : 21,697.76 = 8,553.11 : x
  2. Step 2: Convert to fraction form
    15,722.71/21,697.76 = 8,553.11/x
  3. Step 3: Cross multiply
    15,722.71x = 21,697.76 × 8,553.11
  4. Step 4: Simplify right side
    15,722.71x = 185,583,240.93
  5. Step 5: Solve for x
    x = 185,583,240.93/15,722.71
  6. Step 6: Final answer
    x = 11,803.52

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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.