Home / 17,128.80-25,621.20-15,386.40

Finding the Fourth Proportional to 17,128.80, 25,621.20 and 15,386.40

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Solution

The fourth proportional to 17,128.80, 25,621.20 and 15,386.40 is: 23,014.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,128.80 : 25,621.20 = 15,386.40 : x
  2. Step 2: Convert to fraction form
    17,128.80/25,621.20 = 15,386.40/x
  3. Step 3: Cross multiply
    17,128.80x = 25,621.20 × 15,386.40
  4. Step 4: Simplify right side
    17,128.80x = 394,218,031.68
  5. Step 5: Solve for x
    x = 394,218,031.68/17,128.80
  6. Step 6: Final answer
    x = 23,014.92

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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.