Home / 27,690.50-38,213.32-15,115.28

Finding the Fourth Proportional to 27,690.50, 38,213.32 and 15,115.28

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Solution

The fourth proportional to 27,690.50, 38,213.32 and 15,115.28 is: 20,859.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,690.50 : 38,213.32 = 15,115.28 : x
  2. Step 2: Convert to fraction form
    27,690.50/38,213.32 = 15,115.28/x
  3. Step 3: Cross multiply
    27,690.50x = 38,213.32 × 15,115.28
  4. Step 4: Simplify right side
    27,690.50x = 577,605,031.53
  5. Step 5: Solve for x
    x = 577,605,031.53/27,690.50
  6. Step 6: Final answer
    x = 20,859.32

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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.