Home / 13,988.11-20,982.12-4,127.47

Finding the Fourth Proportional to 13,988.11, 20,982.12 and 4,127.47

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Solution

The fourth proportional to 13,988.11, 20,982.12 and 4,127.47 is: 6,191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.11 : 20,982.12 = 4,127.47 : x
  2. Step 2: Convert to fraction form
    13,988.11/20,982.12 = 4,127.47/x
  3. Step 3: Cross multiply
    13,988.11x = 20,982.12 × 4,127.47
  4. Step 4: Simplify right side
    13,988.11x = 86,603,070.84
  5. Step 5: Solve for x
    x = 86,603,070.84/13,988.11
  6. Step 6: Final answer
    x = 6,191.19

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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.