Home / 20,106.18-27,728.36-12,553.20

Finding the Fourth Proportional to 20,106.18, 27,728.36 and 12,553.20

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Solution

The fourth proportional to 20,106.18, 27,728.36 and 12,553.20 is: 17,312.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.18 : 27,728.36 = 12,553.20 : x
  2. Step 2: Convert to fraction form
    20,106.18/27,728.36 = 12,553.20/x
  3. Step 3: Cross multiply
    20,106.18x = 27,728.36 × 12,553.20
  4. Step 4: Simplify right side
    20,106.18x = 348,079,585.99
  5. Step 5: Solve for x
    x = 348,079,585.99/20,106.18
  6. Step 6: Final answer
    x = 17,312.07

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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.