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Finding the Fourth Proportional to 15,989.66, 22,065.75 and 8,916.53

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Solution

The fourth proportional to 15,989.66, 22,065.75 and 8,916.53 is: 12,304.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,989.66 : 22,065.75 = 8,916.53 : x
  2. Step 2: Convert to fraction form
    15,989.66/22,065.75 = 8,916.53/x
  3. Step 3: Cross multiply
    15,989.66x = 22,065.75 × 8,916.53
  4. Step 4: Simplify right side
    15,989.66x = 196,749,921.85
  5. Step 5: Solve for x
    x = 196,749,921.85/15,989.66
  6. Step 6: Final answer
    x = 12,304.82

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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.