Home / 28,156.62-38,855.52-15,409.76

Finding the Fourth Proportional to 28,156.62, 38,855.52 and 15,409.76

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Solution

The fourth proportional to 28,156.62, 38,855.52 and 15,409.76 is: 21,265.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.62 : 38,855.52 = 15,409.76 : x
  2. Step 2: Convert to fraction form
    28,156.62/38,855.52 = 15,409.76/x
  3. Step 3: Cross multiply
    28,156.62x = 38,855.52 × 15,409.76
  4. Step 4: Simplify right side
    28,156.62x = 598,754,043.60
  5. Step 5: Solve for x
    x = 598,754,043.60/28,156.62
  6. Step 6: Final answer
    x = 21,265.12

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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.