Home / 26,278.80-39,398.12-13,140.40

Finding the Fourth Proportional to 26,278.80, 39,398.12 and 13,140.40

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Solution

The fourth proportional to 26,278.80, 39,398.12 and 13,140.40 is: 19,700.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,278.80 : 39,398.12 = 13,140.40 : x
  2. Step 2: Convert to fraction form
    26,278.80/39,398.12 = 13,140.40/x
  3. Step 3: Cross multiply
    26,278.80x = 39,398.12 × 13,140.40
  4. Step 4: Simplify right side
    26,278.80x = 517,707,056.05
  5. Step 5: Solve for x
    x = 517,707,056.05/26,278.80
  6. Step 6: Final answer
    x = 19,700.56

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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.