Home / 15,869.70-21,895.20-9,154.44

Finding the Fourth Proportional to 15,869.70, 21,895.20 and 9,154.44

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Solution

The fourth proportional to 15,869.70, 21,895.20 and 9,154.44 is: 12,630.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869.70 : 21,895.20 = 9,154.44 : x
  2. Step 2: Convert to fraction form
    15,869.70/21,895.20 = 9,154.44/x
  3. Step 3: Cross multiply
    15,869.70x = 21,895.20 × 9,154.44
  4. Step 4: Simplify right side
    15,869.70x = 200,438,294.69
  5. Step 5: Solve for x
    x = 200,438,294.69/15,869.70
  6. Step 6: Final answer
    x = 12,630.25

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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.