Home / 2,815.86-3,888.92-2,506.65

Finding the Fourth Proportional to 2,815.86, 3,888.92 and 2,506.65

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Solution

The fourth proportional to 2,815.86, 3,888.92 and 2,506.65 is: 3,461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.86 : 3,888.92 = 2,506.65 : x
  2. Step 2: Convert to fraction form
    2,815.86/3,888.92 = 2,506.65/x
  3. Step 3: Cross multiply
    2,815.86x = 3,888.92 × 2,506.65
  4. Step 4: Simplify right side
    2,815.86x = 9,748,148.78
  5. Step 5: Solve for x
    x = 9,748,148.78/2,815.86
  6. Step 6: Final answer
    x = 3,461.87

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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.