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Finding the Fourth Proportional to 10,888.70, 15,029.79 and 8,654.54

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Solution

The fourth proportional to 10,888.70, 15,029.79 and 8,654.54 is: 11,945.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,888.70 : 15,029.79 = 8,654.54 : x
  2. Step 2: Convert to fraction form
    10,888.70/15,029.79 = 8,654.54/x
  3. Step 3: Cross multiply
    10,888.70x = 15,029.79 × 8,654.54
  4. Step 4: Simplify right side
    10,888.70x = 130,075,918.75
  5. Step 5: Solve for x
    x = 130,075,918.75/10,888.70
  6. Step 6: Final answer
    x = 11,945.95

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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.