Home / 20,761.47-28,662.66-13,708.35

Finding the Fourth Proportional to 20,761.47, 28,662.66 and 13,708.35

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Solution

The fourth proportional to 20,761.47, 28,662.66 and 13,708.35 is: 18,925.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.47 : 28,662.66 = 13,708.35 : x
  2. Step 2: Convert to fraction form
    20,761.47/28,662.66 = 13,708.35/x
  3. Step 3: Cross multiply
    20,761.47x = 28,662.66 × 13,708.35
  4. Step 4: Simplify right side
    20,761.47x = 392,917,775.21
  5. Step 5: Solve for x
    x = 392,917,775.21/20,761.47
  6. Step 6: Final answer
    x = 18,925.34

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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.