Home / 12,888.86-19,335.72-4,121.42

Finding the Fourth Proportional to 12,888.86, 19,335.72 and 4,121.42

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Solution

The fourth proportional to 12,888.86, 19,335.72 and 4,121.42 is: 6,182.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.86 : 19,335.72 = 4,121.42 : x
  2. Step 2: Convert to fraction form
    12,888.86/19,335.72 = 4,121.42/x
  3. Step 3: Cross multiply
    12,888.86x = 19,335.72 × 4,121.42
  4. Step 4: Simplify right side
    12,888.86x = 79,690,623.12
  5. Step 5: Solve for x
    x = 79,690,623.12/12,888.86
  6. Step 6: Final answer
    x = 6,182.91

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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.