Home / 20,232.12-27,920.56-11,280.40

Finding the Fourth Proportional to 20,232.12, 27,920.56 and 11,280.40

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Solution

The fourth proportional to 20,232.12, 27,920.56 and 11,280.40 is: 15,567.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,232.12 : 27,920.56 = 11,280.40 : x
  2. Step 2: Convert to fraction form
    20,232.12/27,920.56 = 11,280.40/x
  3. Step 3: Cross multiply
    20,232.12x = 27,920.56 × 11,280.40
  4. Step 4: Simplify right side
    20,232.12x = 314,955,085.02
  5. Step 5: Solve for x
    x = 314,955,085.02/20,232.12
  6. Step 6: Final answer
    x = 15,567.08

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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.