Home / 20,917.28-31,191.40-18,014.24

Finding the Fourth Proportional to 20,917.28, 31,191.40 and 18,014.24

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Solution

The fourth proportional to 20,917.28, 31,191.40 and 18,014.24 is: 26,862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.28 : 31,191.40 = 18,014.24 : x
  2. Step 2: Convert to fraction form
    20,917.28/31,191.40 = 18,014.24/x
  3. Step 3: Cross multiply
    20,917.28x = 31,191.40 × 18,014.24
  4. Step 4: Simplify right side
    20,917.28x = 561,889,365.54
  5. Step 5: Solve for x
    x = 561,889,365.54/20,917.28
  6. Step 6: Final answer
    x = 26,862.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.