Home / 18,381.72-25,357.74-12,005.40

Finding the Fourth Proportional to 18,381.72, 25,357.74 and 12,005.40

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Solution

The fourth proportional to 18,381.72, 25,357.74 and 12,005.40 is: 16,561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.72 : 25,357.74 = 12,005.40 : x
  2. Step 2: Convert to fraction form
    18,381.72/25,357.74 = 12,005.40/x
  3. Step 3: Cross multiply
    18,381.72x = 25,357.74 × 12,005.40
  4. Step 4: Simplify right side
    18,381.72x = 304,429,811.80
  5. Step 5: Solve for x
    x = 304,429,811.80/18,381.72
  6. Step 6: Final answer
    x = 16,561.55

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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.