Home / 15,506.78-21,397.57-8,791.07

Finding the Fourth Proportional to 15,506.78, 21,397.57 and 8,791.07

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Solution

The fourth proportional to 15,506.78, 21,397.57 and 8,791.07 is: 12,130.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,506.78 : 21,397.57 = 8,791.07 : x
  2. Step 2: Convert to fraction form
    15,506.78/21,397.57 = 8,791.07/x
  3. Step 3: Cross multiply
    15,506.78x = 21,397.57 × 8,791.07
  4. Step 4: Simplify right side
    15,506.78x = 188,107,406.73
  5. Step 5: Solve for x
    x = 188,107,406.73/15,506.78
  6. Step 6: Final answer
    x = 12,130.66

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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.