Home / 31,115.56-42,943.16-19,647.13

Finding the Fourth Proportional to 31,115.56, 42,943.16 and 19,647.13

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Solution

The fourth proportional to 31,115.56, 42,943.16 and 19,647.13 is: 27,115.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.56 : 42,943.16 = 19,647.13 : x
  2. Step 2: Convert to fraction form
    31,115.56/42,943.16 = 19,647.13/x
  3. Step 3: Cross multiply
    31,115.56x = 42,943.16 × 19,647.13
  4. Step 4: Simplify right side
    31,115.56x = 843,709,847.13
  5. Step 5: Solve for x
    x = 843,709,847.13/31,115.56
  6. Step 6: Final answer
    x = 27,115.37

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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.