Home / 15,508.36-21,401.58-8,434.78

Finding the Fourth Proportional to 15,508.36, 21,401.58 and 8,434.78

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Solution

The fourth proportional to 15,508.36, 21,401.58 and 8,434.78 is: 11,640.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.36 : 21,401.58 = 8,434.78 : x
  2. Step 2: Convert to fraction form
    15,508.36/21,401.58 = 8,434.78/x
  3. Step 3: Cross multiply
    15,508.36x = 21,401.58 × 8,434.78
  4. Step 4: Simplify right side
    15,508.36x = 180,517,618.95
  5. Step 5: Solve for x
    x = 180,517,618.95/15,508.36
  6. Step 6: Final answer
    x = 11,640.02

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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.