Home / 28,108.30-38,788.80-15,360.92

Finding the Fourth Proportional to 28,108.30, 38,788.80 and 15,360.92

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Solution

The fourth proportional to 28,108.30, 38,788.80 and 15,360.92 is: 21,197.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.30 : 38,788.80 = 15,360.92 : x
  2. Step 2: Convert to fraction form
    28,108.30/38,788.80 = 15,360.92/x
  3. Step 3: Cross multiply
    28,108.30x = 38,788.80 × 15,360.92
  4. Step 4: Simplify right side
    28,108.30x = 595,831,653.70
  5. Step 5: Solve for x
    x = 595,831,653.70/28,108.30
  6. Step 6: Final answer
    x = 21,197.71

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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.