Home / 20,833.71-28,750.40-11,273.57

Finding the Fourth Proportional to 20,833.71, 28,750.40 and 11,273.57

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Solution

The fourth proportional to 20,833.71, 28,750.40 and 11,273.57 is: 15,557.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.71 : 28,750.40 = 11,273.57 : x
  2. Step 2: Convert to fraction form
    20,833.71/28,750.40 = 11,273.57/x
  3. Step 3: Cross multiply
    20,833.71x = 28,750.40 × 11,273.57
  4. Step 4: Simplify right side
    20,833.71x = 324,119,446.81
  5. Step 5: Solve for x
    x = 324,119,446.81/20,833.71
  6. Step 6: Final answer
    x = 15,557.45

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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.