Home / 20,603.15-28,432.36-11,171.71

Finding the Fourth Proportional to 20,603.15, 28,432.36 and 11,171.71

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Solution

The fourth proportional to 20,603.15, 28,432.36 and 11,171.71 is: 15,416.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.15 : 28,432.36 = 11,171.71 : x
  2. Step 2: Convert to fraction form
    20,603.15/28,432.36 = 11,171.71/x
  3. Step 3: Cross multiply
    20,603.15x = 28,432.36 × 11,171.71
  4. Step 4: Simplify right side
    20,603.15x = 317,638,130.04
  5. Step 5: Solve for x
    x = 317,638,130.04/20,603.15
  6. Step 6: Final answer
    x = 15,416.97

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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.