Home / 20,540.06-28,349.67-12,981.57

Finding the Fourth Proportional to 20,540.06, 28,349.67 and 12,981.57

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Solution

The fourth proportional to 20,540.06, 28,349.67 and 12,981.57 is: 17,917.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.06 : 28,349.67 = 12,981.57 : x
  2. Step 2: Convert to fraction form
    20,540.06/28,349.67 = 12,981.57/x
  3. Step 3: Cross multiply
    20,540.06x = 28,349.67 × 12,981.57
  4. Step 4: Simplify right side
    20,540.06x = 368,023,225.58
  5. Step 5: Solve for x
    x = 368,023,225.58/20,540.06
  6. Step 6: Final answer
    x = 17,917.34

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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.