Home / 27,690.84-38,213.28-15,115.68

Finding the Fourth Proportional to 27,690.84, 38,213.28 and 15,115.68

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Solution

The fourth proportional to 27,690.84, 38,213.28 and 15,115.68 is: 20,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,690.84 : 38,213.28 = 15,115.68 : x
  2. Step 2: Convert to fraction form
    27,690.84/38,213.28 = 15,115.68/x
  3. Step 3: Cross multiply
    27,690.84x = 38,213.28 × 15,115.68
  4. Step 4: Simplify right side
    27,690.84x = 577,619,712.23
  5. Step 5: Solve for x
    x = 577,619,712.23/27,690.84
  6. Step 6: Final answer
    x = 20,859.60

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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.