Home / 15,508.43-21,401.69-8,434.86

Finding the Fourth Proportional to 15,508.43, 21,401.69 and 8,434.86

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Solution

The fourth proportional to 15,508.43, 21,401.69 and 8,434.86 is: 11,640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.43 : 21,401.69 = 8,434.86 : x
  2. Step 2: Convert to fraction form
    15,508.43/21,401.69 = 8,434.86/x
  3. Step 3: Cross multiply
    15,508.43x = 21,401.69 × 8,434.86
  4. Step 4: Simplify right side
    15,508.43x = 180,520,258.91
  5. Step 5: Solve for x
    x = 180,520,258.91/15,508.43
  6. Step 6: Final answer
    x = 11,640.14

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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.