Home / 9,940.48-13,722.66-9,139.88

Finding the Fourth Proportional to 9,940.48, 13,722.66 and 9,139.88

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Solution

The fourth proportional to 9,940.48, 13,722.66 and 9,139.88 is: 12,617.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,940.48 : 13,722.66 = 9,139.88 : x
  2. Step 2: Convert to fraction form
    9,940.48/13,722.66 = 9,139.88/x
  3. Step 3: Cross multiply
    9,940.48x = 13,722.66 × 9,139.88
  4. Step 4: Simplify right side
    9,940.48x = 125,423,465.68
  5. Step 5: Solve for x
    x = 125,423,465.68/9,940.48
  6. Step 6: Final answer
    x = 12,617.45

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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.