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Finding the Fourth Proportional to 7,312.58, 10,969.11 and 2,118.50

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Solution

The fourth proportional to 7,312.58, 10,969.11 and 2,118.50 is: 3,177.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.58 : 10,969.11 = 2,118.50 : x
  2. Step 2: Convert to fraction form
    7,312.58/10,969.11 = 2,118.50/x
  3. Step 3: Cross multiply
    7,312.58x = 10,969.11 × 2,118.50
  4. Step 4: Simplify right side
    7,312.58x = 23,238,059.54
  5. Step 5: Solve for x
    x = 23,238,059.54/7,312.58
  6. Step 6: Final answer
    x = 3,177.82

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1.5x scale

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.