Home / 10,511.56-15,776.70-5,320.36

Finding the Fourth Proportional to 10,511.56, 15,776.70 and 5,320.36

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Solution

The fourth proportional to 10,511.56, 15,776.70 and 5,320.36 is: 7,985.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,511.56 : 15,776.70 = 5,320.36 : x
  2. Step 2: Convert to fraction form
    10,511.56/15,776.70 = 5,320.36/x
  3. Step 3: Cross multiply
    10,511.56x = 15,776.70 × 5,320.36
  4. Step 4: Simplify right side
    10,511.56x = 83,937,723.61
  5. Step 5: Solve for x
    x = 83,937,723.61/10,511.56
  6. Step 6: Final answer
    x = 7,985.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.