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Finding the Fourth Proportional to 15,868.17, 21,898.05 and 9,153.69

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Solution

The fourth proportional to 15,868.17, 21,898.05 and 9,153.69 is: 12,632.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.17 : 21,898.05 = 9,153.69 : x
  2. Step 2: Convert to fraction form
    15,868.17/21,898.05 = 9,153.69/x
  3. Step 3: Cross multiply
    15,868.17x = 21,898.05 × 9,153.69
  4. Step 4: Simplify right side
    15,868.17x = 200,447,961.30
  5. Step 5: Solve for x
    x = 200,447,961.30/15,868.17
  6. Step 6: Final answer
    x = 12,632.08

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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.