Home / 20,812.48-28,722.40-11,862.92

Finding the Fourth Proportional to 20,812.48, 28,722.40 and 11,862.92

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Solution

The fourth proportional to 20,812.48, 28,722.40 and 11,862.92 is: 16,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.48 : 28,722.40 = 11,862.92 : x
  2. Step 2: Convert to fraction form
    20,812.48/28,722.40 = 11,862.92/x
  3. Step 3: Cross multiply
    20,812.48x = 28,722.40 × 11,862.92
  4. Step 4: Simplify right side
    20,812.48x = 340,731,575.56
  5. Step 5: Solve for x
    x = 340,731,575.56/20,812.48
  6. Step 6: Final answer
    x = 16,371.50

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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.