Home / 15,868.90-21,898.11-8,795.17

Finding the Fourth Proportional to 15,868.90, 21,898.11 and 8,795.17

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Solution

The fourth proportional to 15,868.90, 21,898.11 and 8,795.17 is: 12,136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.90 : 21,898.11 = 8,795.17 : x
  2. Step 2: Convert to fraction form
    15,868.90/21,898.11 = 8,795.17/x
  3. Step 3: Cross multiply
    15,868.90x = 21,898.11 × 8,795.17
  4. Step 4: Simplify right side
    15,868.90x = 192,597,600.13
  5. Step 5: Solve for x
    x = 192,597,600.13/15,868.90
  6. Step 6: Final answer
    x = 12,136.80

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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.