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Finding the Fourth Proportional to 15,113.44, 20,856.13 and 8,398.89

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Solution

The fourth proportional to 15,113.44, 20,856.13 and 8,398.89 is: 11,590.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.44 : 20,856.13 = 8,398.89 : x
  2. Step 2: Convert to fraction form
    15,113.44/20,856.13 = 8,398.89/x
  3. Step 3: Cross multiply
    15,113.44x = 20,856.13 × 8,398.89
  4. Step 4: Simplify right side
    15,113.44x = 175,168,299.70
  5. Step 5: Solve for x
    x = 175,168,299.70/15,113.44
  6. Step 6: Final answer
    x = 11,590.24

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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.