Home / 10,991.70-15,156.45-7,006.50

Finding the Fourth Proportional to 10,991.70, 15,156.45 and 7,006.50

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Solution

The fourth proportional to 10,991.70, 15,156.45 and 7,006.50 is: 9,661.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.70 : 15,156.45 = 7,006.50 : x
  2. Step 2: Convert to fraction form
    10,991.70/15,156.45 = 7,006.50/x
  3. Step 3: Cross multiply
    10,991.70x = 15,156.45 × 7,006.50
  4. Step 4: Simplify right side
    10,991.70x = 106,193,666.93
  5. Step 5: Solve for x
    x = 106,193,666.93/10,991.70
  6. Step 6: Final answer
    x = 9,661.26

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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.