Home / 8,860.40-13,287.45-3,921.20

Finding the Fourth Proportional to 8,860.40, 13,287.45 and 3,921.20

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Solution

The fourth proportional to 8,860.40, 13,287.45 and 3,921.20 is: 5,880.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.40 : 13,287.45 = 3,921.20 : x
  2. Step 2: Convert to fraction form
    8,860.40/13,287.45 = 3,921.20/x
  3. Step 3: Cross multiply
    8,860.40x = 13,287.45 × 3,921.20
  4. Step 4: Simplify right side
    8,860.40x = 52,102,748.94
  5. Step 5: Solve for x
    x = 52,102,748.94/8,860.40
  6. Step 6: Final answer
    x = 5,880.41

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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.