Home / 6,918.12-10,377.16-1,987.80

Finding the Fourth Proportional to 6,918.12, 10,377.16 and 1,987.80

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Solution

The fourth proportional to 6,918.12, 10,377.16 and 1,987.80 is: 2,981.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.12 : 10,377.16 = 1,987.80 : x
  2. Step 2: Convert to fraction form
    6,918.12/10,377.16 = 1,987.80/x
  3. Step 3: Cross multiply
    6,918.12x = 10,377.16 × 1,987.80
  4. Step 4: Simplify right side
    6,918.12x = 20,627,718.65
  5. Step 5: Solve for x
    x = 20,627,718.65/6,918.12
  6. Step 6: Final answer
    x = 2,981.69

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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.