Home / 8,987.46-12,399.18-5,628.84

Finding the Fourth Proportional to 8,987.46, 12,399.18 and 5,628.84

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Solution

The fourth proportional to 8,987.46, 12,399.18 and 5,628.84 is: 7,765.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.46 : 12,399.18 = 5,628.84 : x
  2. Step 2: Convert to fraction form
    8,987.46/12,399.18 = 5,628.84/x
  3. Step 3: Cross multiply
    8,987.46x = 12,399.18 × 5,628.84
  4. Step 4: Simplify right side
    8,987.46x = 69,793,000.35
  5. Step 5: Solve for x
    x = 69,793,000.35/8,987.46
  6. Step 6: Final answer
    x = 7,765.60

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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.