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Finding the Fourth Proportional to 15,737.94, 21,719.68 and 8,665.70

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Solution

The fourth proportional to 15,737.94, 21,719.68 and 8,665.70 is: 11,959.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,737.94 : 21,719.68 = 8,665.70 : x
  2. Step 2: Convert to fraction form
    15,737.94/21,719.68 = 8,665.70/x
  3. Step 3: Cross multiply
    15,737.94x = 21,719.68 × 8,665.70
  4. Step 4: Simplify right side
    15,737.94x = 188,216,100.71
  5. Step 5: Solve for x
    x = 188,216,100.71/15,737.94
  6. Step 6: Final answer
    x = 11,959.39

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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.