Home / 13,542.78-18,687.45-7,574.31

Finding the Fourth Proportional to 13,542.78, 18,687.45 and 7,574.31

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Solution

The fourth proportional to 13,542.78, 18,687.45 and 7,574.31 is: 10,451.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,542.78 : 18,687.45 = 7,574.31 : x
  2. Step 2: Convert to fraction form
    13,542.78/18,687.45 = 7,574.31/x
  3. Step 3: Cross multiply
    13,542.78x = 18,687.45 × 7,574.31
  4. Step 4: Simplify right side
    13,542.78x = 141,544,539.41
  5. Step 5: Solve for x
    x = 141,544,539.41/13,542.78
  6. Step 6: Final answer
    x = 10,451.66

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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.