Home / 28,132.40-38,823-15,557.60

Finding the Fourth Proportional to 28,132.40, 38,823 and 15,557.60

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Solution

The fourth proportional to 28,132.40, 38,823 and 15,557.60 is: 21,469.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,132.40 : 38,823 = 15,557.60 : x
  2. Step 2: Convert to fraction form
    28,132.40/38,823 = 15,557.60/x
  3. Step 3: Cross multiply
    28,132.40x = 38,823 × 15,557.60
  4. Step 4: Simplify right side
    28,132.40x = 603,992,704.80
  5. Step 5: Solve for x
    x = 603,992,704.80/28,132.40
  6. Step 6: Final answer
    x = 21,469.65

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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.