Home / 6,918.93-10,378.13-1,988.55

Finding the Fourth Proportional to 6,918.93, 10,378.13 and 1,988.55

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Solution

The fourth proportional to 6,918.93, 10,378.13 and 1,988.55 is: 2,982.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.93 : 10,378.13 = 1,988.55 : x
  2. Step 2: Convert to fraction form
    6,918.93/10,378.13 = 1,988.55/x
  3. Step 3: Cross multiply
    6,918.93x = 10,378.13 × 1,988.55
  4. Step 4: Simplify right side
    6,918.93x = 20,637,420.47
  5. Step 5: Solve for x
    x = 20,637,420.47/6,918.93
  6. Step 6: Final answer
    x = 2,982.75

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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.