Home / 20,869.40-28,799.86-11,309.30

Finding the Fourth Proportional to 20,869.40, 28,799.86 and 11,309.30

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Solution

The fourth proportional to 20,869.40, 28,799.86 and 11,309.30 is: 15,606.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.40 : 28,799.86 = 11,309.30 : x
  2. Step 2: Convert to fraction form
    20,869.40/28,799.86 = 11,309.30/x
  3. Step 3: Cross multiply
    20,869.40x = 28,799.86 × 11,309.30
  4. Step 4: Simplify right side
    20,869.40x = 325,706,256.70
  5. Step 5: Solve for x
    x = 325,706,256.70/20,869.40
  6. Step 6: Final answer
    x = 15,606.88

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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.