Home / 5,187.19-7,780.78-1,680.13

Finding the Fourth Proportional to 5,187.19, 7,780.78 and 1,680.13

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Solution

The fourth proportional to 5,187.19, 7,780.78 and 1,680.13 is: 2,520.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.19 : 7,780.78 = 1,680.13 : x
  2. Step 2: Convert to fraction form
    5,187.19/7,780.78 = 1,680.13/x
  3. Step 3: Cross multiply
    5,187.19x = 7,780.78 × 1,680.13
  4. Step 4: Simplify right side
    5,187.19x = 13,072,683.00
  5. Step 5: Solve for x
    x = 13,072,683.00/5,187.19
  6. Step 6: Final answer
    x = 2,520.19

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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.