Home / 27,981.68-38,616.90-15,408.68

Finding the Fourth Proportional to 27,981.68, 38,616.90 and 15,408.68

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Solution

The fourth proportional to 27,981.68, 38,616.90 and 15,408.68 is: 21,265.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.68 : 38,616.90 = 15,408.68 : x
  2. Step 2: Convert to fraction form
    27,981.68/38,616.90 = 15,408.68/x
  3. Step 3: Cross multiply
    27,981.68x = 38,616.90 × 15,408.68
  4. Step 4: Simplify right side
    27,981.68x = 595,035,454.69
  5. Step 5: Solve for x
    x = 595,035,454.69/27,981.68
  6. Step 6: Final answer
    x = 21,265.18

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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.