Home / 15,543.45-21,449.88-8,469.81

Finding the Fourth Proportional to 15,543.45, 21,449.88 and 8,469.81

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Solution

The fourth proportional to 15,543.45, 21,449.88 and 8,469.81 is: 11,688.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.45 : 21,449.88 = 8,469.81 : x
  2. Step 2: Convert to fraction form
    15,543.45/21,449.88 = 8,469.81/x
  3. Step 3: Cross multiply
    15,543.45x = 21,449.88 × 8,469.81
  4. Step 4: Simplify right side
    15,543.45x = 181,676,408.12
  5. Step 5: Solve for x
    x = 181,676,408.12/15,543.45
  6. Step 6: Final answer
    x = 11,688.29

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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.