Home / 20,603.18-28,432.41-11,171.75

Finding the Fourth Proportional to 20,603.18, 28,432.41 and 11,171.75

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Solution

The fourth proportional to 20,603.18, 28,432.41 and 11,171.75 is: 15,417.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.18 : 28,432.41 = 11,171.75 : x
  2. Step 2: Convert to fraction form
    20,603.18/28,432.41 = 11,171.75/x
  3. Step 3: Cross multiply
    20,603.18x = 28,432.41 × 11,171.75
  4. Step 4: Simplify right side
    20,603.18x = 317,639,578.40
  5. Step 5: Solve for x
    x = 317,639,578.40/20,603.18
  6. Step 6: Final answer
    x = 15,417.02

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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.