Home / 19,181.72-28,780.78-10,422.92

Finding the Fourth Proportional to 19,181.72, 28,780.78 and 10,422.92

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Solution

The fourth proportional to 19,181.72, 28,780.78 and 10,422.92 is: 15,638.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,181.72 : 28,780.78 = 10,422.92 : x
  2. Step 2: Convert to fraction form
    19,181.72/28,780.78 = 10,422.92/x
  3. Step 3: Cross multiply
    19,181.72x = 28,780.78 × 10,422.92
  4. Step 4: Simplify right side
    19,181.72x = 299,979,767.48
  5. Step 5: Solve for x
    x = 299,979,767.48/19,181.72
  6. Step 6: Final answer
    x = 15,638.84

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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.