Home / 20,603.28-28,432.40-11,171.84

Finding the Fourth Proportional to 20,603.28, 28,432.40 and 11,171.84

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Solution

The fourth proportional to 20,603.28, 28,432.40 and 11,171.84 is: 15,417.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.28 : 28,432.40 = 11,171.84 : x
  2. Step 2: Convert to fraction form
    20,603.28/28,432.40 = 11,171.84/x
  3. Step 3: Cross multiply
    20,603.28x = 28,432.40 × 11,171.84
  4. Step 4: Simplify right side
    20,603.28x = 317,642,223.62
  5. Step 5: Solve for x
    x = 317,642,223.62/20,603.28
  6. Step 6: Final answer
    x = 15,417.07

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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.