Home / 15,496.77-21,385.68-8,423.20

Finding the Fourth Proportional to 15,496.77, 21,385.68 and 8,423.20

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Solution

The fourth proportional to 15,496.77, 21,385.68 and 8,423.20 is: 11,624.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,496.77 : 21,385.68 = 8,423.20 : x
  2. Step 2: Convert to fraction form
    15,496.77/21,385.68 = 8,423.20/x
  3. Step 3: Cross multiply
    15,496.77x = 21,385.68 × 8,423.20
  4. Step 4: Simplify right side
    15,496.77x = 180,135,859.78
  5. Step 5: Solve for x
    x = 180,135,859.78/15,496.77
  6. Step 6: Final answer
    x = 11,624.09

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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.