Home / 6,919.97-10,378.40-1,988.51

Finding the Fourth Proportional to 6,919.97, 10,378.40 and 1,988.51

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Solution

The fourth proportional to 6,919.97, 10,378.40 and 1,988.51 is: 2,982.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.97 : 10,378.40 = 1,988.51 : x
  2. Step 2: Convert to fraction form
    6,919.97/10,378.40 = 1,988.51/x
  3. Step 3: Cross multiply
    6,919.97x = 10,378.40 × 1,988.51
  4. Step 4: Simplify right side
    6,919.97x = 20,637,490.35
  5. Step 5: Solve for x
    x = 20,637,490.35/6,919.97
  6. Step 6: Final answer
    x = 2,982.31

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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.