Home / 20,615.52-28,441.66-12,118.01

Finding the Fourth Proportional to 20,615.52, 28,441.66 and 12,118.01

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Solution

The fourth proportional to 20,615.52, 28,441.66 and 12,118.01 is: 16,718.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.52 : 28,441.66 = 12,118.01 : x
  2. Step 2: Convert to fraction form
    20,615.52/28,441.66 = 12,118.01/x
  3. Step 3: Cross multiply
    20,615.52x = 28,441.66 × 12,118.01
  4. Step 4: Simplify right side
    20,615.52x = 344,656,320.30
  5. Step 5: Solve for x
    x = 344,656,320.30/20,615.52
  6. Step 6: Final answer
    x = 16,718.29

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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.