Home / 21,178.74-31,816.74-18,226.28

Finding the Fourth Proportional to 21,178.74, 31,816.74 and 18,226.28

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Solution

The fourth proportional to 21,178.74, 31,816.74 and 18,226.28 is: 27,381.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.74 : 31,816.74 = 18,226.28 : x
  2. Step 2: Convert to fraction form
    21,178.74/31,816.74 = 18,226.28/x
  3. Step 3: Cross multiply
    21,178.74x = 31,816.74 × 18,226.28
  4. Step 4: Simplify right side
    21,178.74x = 579,900,811.93
  5. Step 5: Solve for x
    x = 579,900,811.93/21,178.74
  6. Step 6: Final answer
    x = 27,381.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.