Home / 5,123.51-7,680.46-2,780.08

Finding the Fourth Proportional to 5,123.51, 7,680.46 and 2,780.08

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Solution

The fourth proportional to 5,123.51, 7,680.46 and 2,780.08 is: 4,167.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.51 : 7,680.46 = 2,780.08 : x
  2. Step 2: Convert to fraction form
    5,123.51/7,680.46 = 2,780.08/x
  3. Step 3: Cross multiply
    5,123.51x = 7,680.46 × 2,780.08
  4. Step 4: Simplify right side
    5,123.51x = 21,352,293.24
  5. Step 5: Solve for x
    x = 21,352,293.24/5,123.51
  6. Step 6: Final answer
    x = 4,167.51

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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.