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Finding the Fourth Proportional to 20,775.98, 28,660.88 and 15,101.93

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Solution

The fourth proportional to 20,775.98, 28,660.88 and 15,101.93 is: 20,833.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.98 : 28,660.88 = 15,101.93 : x
  2. Step 2: Convert to fraction form
    20,775.98/28,660.88 = 15,101.93/x
  3. Step 3: Cross multiply
    20,775.98x = 28,660.88 × 15,101.93
  4. Step 4: Simplify right side
    20,775.98x = 432,834,603.50
  5. Step 5: Solve for x
    x = 432,834,603.50/20,775.98
  6. Step 6: Final answer
    x = 20,833.41

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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.