Home / 15,121.56-20,862.23-9,151.05

Finding the Fourth Proportional to 15,121.56, 20,862.23 and 9,151.05

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Solution

The fourth proportional to 15,121.56, 20,862.23 and 9,151.05 is: 12,625.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.56 : 20,862.23 = 9,151.05 : x
  2. Step 2: Convert to fraction form
    15,121.56/20,862.23 = 9,151.05/x
  3. Step 3: Cross multiply
    15,121.56x = 20,862.23 × 9,151.05
  4. Step 4: Simplify right side
    15,121.56x = 190,911,264.09
  5. Step 5: Solve for x
    x = 190,911,264.09/15,121.56
  6. Step 6: Final answer
    x = 12,625.10

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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.