Home / 20,869.32-28,799.54-11,438.28

Finding the Fourth Proportional to 20,869.32, 28,799.54 and 11,438.28

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Solution

The fourth proportional to 20,869.32, 28,799.54 and 11,438.28 is: 15,784.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.32 : 28,799.54 = 11,438.28 : x
  2. Step 2: Convert to fraction form
    20,869.32/28,799.54 = 11,438.28/x
  3. Step 3: Cross multiply
    20,869.32x = 28,799.54 × 11,438.28
  4. Step 4: Simplify right side
    20,869.32x = 329,417,202.39
  5. Step 5: Solve for x
    x = 329,417,202.39/20,869.32
  6. Step 6: Final answer
    x = 15,784.76

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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.