Home / 15,120.32-20,862.64-9,150.72

Finding the Fourth Proportional to 15,120.32, 20,862.64 and 9,150.72

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Solution

The fourth proportional to 15,120.32, 20,862.64 and 9,150.72 is: 12,625.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.32 : 20,862.64 = 9,150.72 : x
  2. Step 2: Convert to fraction form
    15,120.32/20,862.64 = 9,150.72/x
  3. Step 3: Cross multiply
    15,120.32x = 20,862.64 × 9,150.72
  4. Step 4: Simplify right side
    15,120.32x = 190,908,177.10
  5. Step 5: Solve for x
    x = 190,908,177.10/15,120.32
  6. Step 6: Final answer
    x = 12,625.93

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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.