Home / 28,128.95-38,817.99-15,382.19

Finding the Fourth Proportional to 28,128.95, 38,817.99 and 15,382.19

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Solution

The fourth proportional to 28,128.95, 38,817.99 and 15,382.19 is: 21,227.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.95 : 38,817.99 = 15,382.19 : x
  2. Step 2: Convert to fraction form
    28,128.95/38,817.99 = 15,382.19/x
  3. Step 3: Cross multiply
    28,128.95x = 38,817.99 × 15,382.19
  4. Step 4: Simplify right side
    28,128.95x = 597,105,697.60
  5. Step 5: Solve for x
    x = 597,105,697.60/28,128.95
  6. Step 6: Final answer
    x = 21,227.44

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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.