Home / 21,919.78-32,885.16-12,570.35

Finding the Fourth Proportional to 21,919.78, 32,885.16 and 12,570.35

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Solution

The fourth proportional to 21,919.78, 32,885.16 and 12,570.35 is: 18,858.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.78 : 32,885.16 = 12,570.35 : x
  2. Step 2: Convert to fraction form
    21,919.78/32,885.16 = 12,570.35/x
  3. Step 3: Cross multiply
    21,919.78x = 32,885.16 × 12,570.35
  4. Step 4: Simplify right side
    21,919.78x = 413,377,944.42
  5. Step 5: Solve for x
    x = 413,377,944.42/21,919.78
  6. Step 6: Final answer
    x = 18,858.68

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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.