Home / 20,615.24-28,449.72-12,117.23

Finding the Fourth Proportional to 20,615.24, 28,449.72 and 12,117.23

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Solution

The fourth proportional to 20,615.24, 28,449.72 and 12,117.23 is: 16,722.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.24 : 28,449.72 = 12,117.23 : x
  2. Step 2: Convert to fraction form
    20,615.24/28,449.72 = 12,117.23/x
  3. Step 3: Cross multiply
    20,615.24x = 28,449.72 × 12,117.23
  4. Step 4: Simplify right side
    20,615.24x = 344,731,871.80
  5. Step 5: Solve for x
    x = 344,731,871.80/20,615.24
  6. Step 6: Final answer
    x = 16,722.19

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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.