Home / 20,540.47-28,346.70-12,984.08

Finding the Fourth Proportional to 20,540.47, 28,346.70 and 12,984.08

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Solution

The fourth proportional to 20,540.47, 28,346.70 and 12,984.08 is: 17,918.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.47 : 28,346.70 = 12,984.08 : x
  2. Step 2: Convert to fraction form
    20,540.47/28,346.70 = 12,984.08/x
  3. Step 3: Cross multiply
    20,540.47x = 28,346.70 × 12,984.08
  4. Step 4: Simplify right side
    20,540.47x = 368,055,833.79
  5. Step 5: Solve for x
    x = 368,055,833.79/20,540.47
  6. Step 6: Final answer
    x = 17,918.57

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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.