Home / 7,780.89-11,671.31-1,937.51

Finding the Fourth Proportional to 7,780.89, 11,671.31 and 1,937.51

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Solution

The fourth proportional to 7,780.89, 11,671.31 and 1,937.51 is: 2,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.89 : 11,671.31 = 1,937.51 : x
  2. Step 2: Convert to fraction form
    7,780.89/11,671.31 = 1,937.51/x
  3. Step 3: Cross multiply
    7,780.89x = 11,671.31 × 1,937.51
  4. Step 4: Simplify right side
    7,780.89x = 22,613,226.33
  5. Step 5: Solve for x
    x = 22,613,226.33/7,780.89
  6. Step 6: Final answer
    x = 2,906.25

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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.