Home / 28,384.57-39,170.22-15,638.95

Finding the Fourth Proportional to 28,384.57, 39,170.22 and 15,638.95

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Solution

The fourth proportional to 28,384.57, 39,170.22 and 15,638.95 is: 21,581.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.57 : 39,170.22 = 15,638.95 : x
  2. Step 2: Convert to fraction form
    28,384.57/39,170.22 = 15,638.95/x
  3. Step 3: Cross multiply
    28,384.57x = 39,170.22 × 15,638.95
  4. Step 4: Simplify right side
    28,384.57x = 612,581,112.07
  5. Step 5: Solve for x
    x = 612,581,112.07/28,384.57
  6. Step 6: Final answer
    x = 21,581.48

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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.