Home / 8,987.12-12,401.44-5,009.16

Finding the Fourth Proportional to 8,987.12, 12,401.44 and 5,009.16

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Solution

The fourth proportional to 8,987.12, 12,401.44 and 5,009.16 is: 6,912.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.12 : 12,401.44 = 5,009.16 : x
  2. Step 2: Convert to fraction form
    8,987.12/12,401.44 = 5,009.16/x
  3. Step 3: Cross multiply
    8,987.12x = 12,401.44 × 5,009.16
  4. Step 4: Simplify right side
    8,987.12x = 62,120,797.19
  5. Step 5: Solve for x
    x = 62,120,797.19/8,987.12
  6. Step 6: Final answer
    x = 6,912.20

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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.