Home / 8,918.04-13,380.16-3,988.20

Finding the Fourth Proportional to 8,918.04, 13,380.16 and 3,988.20

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Solution

The fourth proportional to 8,918.04, 13,380.16 and 3,988.20 is: 5,983.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.04 : 13,380.16 = 3,988.20 : x
  2. Step 2: Convert to fraction form
    8,918.04/13,380.16 = 3,988.20/x
  3. Step 3: Cross multiply
    8,918.04x = 13,380.16 × 3,988.20
  4. Step 4: Simplify right side
    8,918.04x = 53,362,754.11
  5. Step 5: Solve for x
    x = 53,362,754.11/8,918.04
  6. Step 6: Final answer
    x = 5,983.69

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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.