Home / 20,571.44-28,388.61-11,140.00

Finding the Fourth Proportional to 20,571.44, 28,388.61 and 11,140.00

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Solution

The fourth proportional to 20,571.44, 28,388.61 and 11,140.00 is: 15,373.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.44 : 28,388.61 = 11,140.00 : x
  2. Step 2: Convert to fraction form
    20,571.44/28,388.61 = 11,140.00/x
  3. Step 3: Cross multiply
    20,571.44x = 28,388.61 × 11,140.00
  4. Step 4: Simplify right side
    20,571.44x = 316,249,044.43
  5. Step 5: Solve for x
    x = 316,249,044.43/20,571.44
  6. Step 6: Final answer
    x = 15,373.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.