Home / 20,218.87-27,900.91-11,143.93

Finding the Fourth Proportional to 20,218.87, 27,900.91 and 11,143.93

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Solution

The fourth proportional to 20,218.87, 27,900.91 and 11,143.93 is: 15,378.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.87 : 27,900.91 = 11,143.93 : x
  2. Step 2: Convert to fraction form
    20,218.87/27,900.91 = 11,143.93/x
  3. Step 3: Cross multiply
    20,218.87x = 27,900.91 × 11,143.93
  4. Step 4: Simplify right side
    20,218.87x = 310,925,787.98
  5. Step 5: Solve for x
    x = 310,925,787.98/20,218.87
  6. Step 6: Final answer
    x = 15,378.00

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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.