Home / 10,862.78-16,290.30-4,287.20

Finding the Fourth Proportional to 10,862.78, 16,290.30 and 4,287.20

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Solution

The fourth proportional to 10,862.78, 16,290.30 and 4,287.20 is: 6,429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,862.78 : 16,290.30 = 4,287.20 : x
  2. Step 2: Convert to fraction form
    10,862.78/16,290.30 = 4,287.20/x
  3. Step 3: Cross multiply
    10,862.78x = 16,290.30 × 4,287.20
  4. Step 4: Simplify right side
    10,862.78x = 69,839,774.16
  5. Step 5: Solve for x
    x = 69,839,774.16/10,862.78
  6. Step 6: Final answer
    x = 6,429.27

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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.