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Finding the Fourth Proportional to 9,111, 12,573.27 and 5,131.92

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Solution

The fourth proportional to 9,111, 12,573.27 and 5,131.92 is: 7,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,111 : 12,573.27 = 5,131.92 : x
  2. Step 2: Convert to fraction form
    9,111/12,573.27 = 5,131.92/x
  3. Step 3: Cross multiply
    9,111x = 12,573.27 × 5,131.92
  4. Step 4: Simplify right side
    9,111x = 64,525,015.78
  5. Step 5: Solve for x
    x = 64,525,015.78/9,111
  6. Step 6: Final answer
    x = 7,082.10

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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.