Home / 10,290.20-15,419.07-7,955.91

Finding the Fourth Proportional to 10,290.20, 15,419.07 and 7,955.91

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Solution

The fourth proportional to 10,290.20, 15,419.07 and 7,955.91 is: 11,921.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,290.20 : 15,419.07 = 7,955.91 : x
  2. Step 2: Convert to fraction form
    10,290.20/15,419.07 = 7,955.91/x
  3. Step 3: Cross multiply
    10,290.20x = 15,419.07 × 7,955.91
  4. Step 4: Simplify right side
    10,290.20x = 122,672,733.20
  5. Step 5: Solve for x
    x = 122,672,733.20/10,290.20
  6. Step 6: Final answer
    x = 11,921.32

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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.