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Finding the Fourth Proportional to 13,998.52, 20,998.18 and 4,642.61

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Solution

The fourth proportional to 13,998.52, 20,998.18 and 4,642.61 is: 6,964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.52 : 20,998.18 = 4,642.61 : x
  2. Step 2: Convert to fraction form
    13,998.52/20,998.18 = 4,642.61/x
  3. Step 3: Cross multiply
    13,998.52x = 20,998.18 × 4,642.61
  4. Step 4: Simplify right side
    13,998.52x = 97,486,360.45
  5. Step 5: Solve for x
    x = 97,486,360.45/13,998.52
  6. Step 6: Final answer
    x = 6,964.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.