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Finding the Fourth Proportional to 15,881.54, 21,930.48 and 9,923.38

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Solution

The fourth proportional to 15,881.54, 21,930.48 and 9,923.38 is: 13,702.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.54 : 21,930.48 = 9,923.38 : x
  2. Step 2: Convert to fraction form
    15,881.54/21,930.48 = 9,923.38/x
  3. Step 3: Cross multiply
    15,881.54x = 21,930.48 × 9,923.38
  4. Step 4: Simplify right side
    15,881.54x = 217,624,486.62
  5. Step 5: Solve for x
    x = 217,624,486.62/15,881.54
  6. Step 6: Final answer
    x = 13,702.98

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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.