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Finding the Fourth Proportional to 8,811.90, 12,152.18 and 7,025.31

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Solution

The fourth proportional to 8,811.90, 12,152.18 and 7,025.31 is: 9,688.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.90 : 12,152.18 = 7,025.31 : x
  2. Step 2: Convert to fraction form
    8,811.90/12,152.18 = 7,025.31/x
  3. Step 3: Cross multiply
    8,811.90x = 12,152.18 × 7,025.31
  4. Step 4: Simplify right side
    8,811.90x = 85,372,849.24
  5. Step 5: Solve for x
    x = 85,372,849.24/8,811.90
  6. Step 6: Final answer
    x = 9,688.36

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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.