Home / 15,240.74-21,030.30-9,191.28

Finding the Fourth Proportional to 15,240.74, 21,030.30 and 9,191.28

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Solution

The fourth proportional to 15,240.74, 21,030.30 and 9,191.28 is: 12,682.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,240.74 : 21,030.30 = 9,191.28 : x
  2. Step 2: Convert to fraction form
    15,240.74/21,030.30 = 9,191.28/x
  3. Step 3: Cross multiply
    15,240.74x = 21,030.30 × 9,191.28
  4. Step 4: Simplify right side
    15,240.74x = 193,295,375.78
  5. Step 5: Solve for x
    x = 193,295,375.78/15,240.74
  6. Step 6: Final answer
    x = 12,682.81

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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.