Home / 15,217.32-20,919.28-13,085.04

Finding the Fourth Proportional to 15,217.32, 20,919.28 and 13,085.04

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Solution

The fourth proportional to 15,217.32, 20,919.28 and 13,085.04 is: 17,988.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.32 : 20,919.28 = 13,085.04 : x
  2. Step 2: Convert to fraction form
    15,217.32/20,919.28 = 13,085.04/x
  3. Step 3: Cross multiply
    15,217.32x = 20,919.28 × 13,085.04
  4. Step 4: Simplify right side
    15,217.32x = 273,729,615.57
  5. Step 5: Solve for x
    x = 273,729,615.57/15,217.32
  6. Step 6: Final answer
    x = 17,988.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.