Home / 15,508.42-21,401.55-8,434.85

Finding the Fourth Proportional to 15,508.42, 21,401.55 and 8,434.85

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Solution

The fourth proportional to 15,508.42, 21,401.55 and 8,434.85 is: 11,640.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.42 : 21,401.55 = 8,434.85 : x
  2. Step 2: Convert to fraction form
    15,508.42/21,401.55 = 8,434.85/x
  3. Step 3: Cross multiply
    15,508.42x = 21,401.55 × 8,434.85
  4. Step 4: Simplify right side
    15,508.42x = 180,518,864.02
  5. Step 5: Solve for x
    x = 180,518,864.02/15,508.42
  6. Step 6: Final answer
    x = 11,640.06

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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.