Home / 12,990.42-19,352.75-12,363.48

Finding the Fourth Proportional to 12,990.42, 19,352.75 and 12,363.48

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Solution

The fourth proportional to 12,990.42, 19,352.75 and 12,363.48 is: 18,418.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.42 : 19,352.75 = 12,363.48 : x
  2. Step 2: Convert to fraction form
    12,990.42/19,352.75 = 12,363.48/x
  3. Step 3: Cross multiply
    12,990.42x = 19,352.75 × 12,363.48
  4. Step 4: Simplify right side
    12,990.42x = 239,267,275.75
  5. Step 5: Solve for x
    x = 239,267,275.75/12,990.42
  6. Step 6: Final answer
    x = 18,418.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.