Home / 26,758.71-40,138.49-12,720.20

Finding the Fourth Proportional to 26,758.71, 40,138.49 and 12,720.20

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Solution

The fourth proportional to 26,758.71, 40,138.49 and 12,720.20 is: 19,080.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,758.71 : 40,138.49 = 12,720.20 : x
  2. Step 2: Convert to fraction form
    26,758.71/40,138.49 = 12,720.20/x
  3. Step 3: Cross multiply
    26,758.71x = 40,138.49 × 12,720.20
  4. Step 4: Simplify right side
    26,758.71x = 510,569,356.20
  5. Step 5: Solve for x
    x = 510,569,356.20/26,758.71
  6. Step 6: Final answer
    x = 19,080.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.