Home / 8,657.16-12,984.12-5,390.43

Finding the Fourth Proportional to 8,657.16, 12,984.12 and 5,390.43

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Solution

The fourth proportional to 8,657.16, 12,984.12 and 5,390.43 is: 8,084.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.16 : 12,984.12 = 5,390.43 : x
  2. Step 2: Convert to fraction form
    8,657.16/12,984.12 = 5,390.43/x
  3. Step 3: Cross multiply
    8,657.16x = 12,984.12 × 5,390.43
  4. Step 4: Simplify right side
    8,657.16x = 69,989,989.97
  5. Step 5: Solve for x
    x = 69,989,989.97/8,657.16
  6. Step 6: Final answer
    x = 8,084.64

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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.