Home / 8,988.15-12,405.32-5,213.76

Finding the Fourth Proportional to 8,988.15, 12,405.32 and 5,213.76

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Solution

The fourth proportional to 8,988.15, 12,405.32 and 5,213.76 is: 7,195.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.15 : 12,405.32 = 5,213.76 : x
  2. Step 2: Convert to fraction form
    8,988.15/12,405.32 = 5,213.76/x
  3. Step 3: Cross multiply
    8,988.15x = 12,405.32 × 5,213.76
  4. Step 4: Simplify right side
    8,988.15x = 64,678,361.20
  5. Step 5: Solve for x
    x = 64,678,361.20/8,988.15
  6. Step 6: Final answer
    x = 7,195.96

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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.