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Finding the Fourth Proportional to 15,874.72, 21,908.40 and 8,801.60

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Solution

The fourth proportional to 15,874.72, 21,908.40 and 8,801.60 is: 12,146.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.72 : 21,908.40 = 8,801.60 : x
  2. Step 2: Convert to fraction form
    15,874.72/21,908.40 = 8,801.60/x
  3. Step 3: Cross multiply
    15,874.72x = 21,908.40 × 8,801.60
  4. Step 4: Simplify right side
    15,874.72x = 192,828,973.44
  5. Step 5: Solve for x
    x = 192,828,973.44/15,874.72
  6. Step 6: Final answer
    x = 12,146.92

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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.