Home / 9,139.20-13,719.60-9,074.40

Finding the Fourth Proportional to 9,139.20, 13,719.60 and 9,074.40

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Solution

The fourth proportional to 9,139.20, 13,719.60 and 9,074.40 is: 13,622.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.20 : 13,719.60 = 9,074.40 : x
  2. Step 2: Convert to fraction form
    9,139.20/13,719.60 = 9,074.40/x
  3. Step 3: Cross multiply
    9,139.20x = 13,719.60 × 9,074.40
  4. Step 4: Simplify right side
    9,139.20x = 124,497,138.24
  5. Step 5: Solve for x
    x = 124,497,138.24/9,139.20
  6. Step 6: Final answer
    x = 13,622.32

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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.