Home / 20,088.90-27,724.32-11,139.21

Finding the Fourth Proportional to 20,088.90, 27,724.32 and 11,139.21

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Solution

The fourth proportional to 20,088.90, 27,724.32 and 11,139.21 is: 15,373.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.90 : 27,724.32 = 11,139.21 : x
  2. Step 2: Convert to fraction form
    20,088.90/27,724.32 = 11,139.21/x
  3. Step 3: Cross multiply
    20,088.90x = 27,724.32 × 11,139.21
  4. Step 4: Simplify right side
    20,088.90x = 308,827,022.59
  5. Step 5: Solve for x
    x = 308,827,022.59/20,088.90
  6. Step 6: Final answer
    x = 15,373.02

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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.