Home / 13,988.64-20,983.23-4,128.12

Finding the Fourth Proportional to 13,988.64, 20,983.23 and 4,128.12

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Solution

The fourth proportional to 13,988.64, 20,983.23 and 4,128.12 is: 6,192.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.64 : 20,983.23 = 4,128.12 : x
  2. Step 2: Convert to fraction form
    13,988.64/20,983.23 = 4,128.12/x
  3. Step 3: Cross multiply
    13,988.64x = 20,983.23 × 4,128.12
  4. Step 4: Simplify right side
    13,988.64x = 86,621,291.43
  5. Step 5: Solve for x
    x = 86,621,291.43/13,988.64
  6. Step 6: Final answer
    x = 6,192.26

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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.