Home / 21,197.78-31,790.55-8,547.53

Finding the Fourth Proportional to 21,197.78, 31,790.55 and 8,547.53

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Solution

The fourth proportional to 21,197.78, 31,790.55 and 8,547.53 is: 12,818.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197.78 : 31,790.55 = 8,547.53 : x
  2. Step 2: Convert to fraction form
    21,197.78/31,790.55 = 8,547.53/x
  3. Step 3: Cross multiply
    21,197.78x = 31,790.55 × 8,547.53
  4. Step 4: Simplify right side
    21,197.78x = 271,730,679.84
  5. Step 5: Solve for x
    x = 271,730,679.84/21,197.78
  6. Step 6: Final answer
    x = 12,818.83

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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.