Home / 20,689.48-28,551.45-11,257.84

Finding the Fourth Proportional to 20,689.48, 28,551.45 and 11,257.84

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Solution

The fourth proportional to 20,689.48, 28,551.45 and 11,257.84 is: 15,535.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.48 : 28,551.45 = 11,257.84 : x
  2. Step 2: Convert to fraction form
    20,689.48/28,551.45 = 11,257.84/x
  3. Step 3: Cross multiply
    20,689.48x = 28,551.45 × 11,257.84
  4. Step 4: Simplify right side
    20,689.48x = 321,427,655.87
  5. Step 5: Solve for x
    x = 321,427,655.87/20,689.48
  6. Step 6: Final answer
    x = 15,535.80

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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.