Home / 15,722.27-21,708.91-12,082.55

Finding the Fourth Proportional to 15,722.27, 21,708.91 and 12,082.55

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Solution

The fourth proportional to 15,722.27, 21,708.91 and 12,082.55 is: 16,683.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,722.27 : 21,708.91 = 12,082.55 : x
  2. Step 2: Convert to fraction form
    15,722.27/21,708.91 = 12,082.55/x
  3. Step 3: Cross multiply
    15,722.27x = 21,708.91 × 12,082.55
  4. Step 4: Simplify right side
    15,722.27x = 262,298,990.52
  5. Step 5: Solve for x
    x = 262,298,990.52/15,722.27
  6. Step 6: Final answer
    x = 16,683.28

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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.