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Finding the Fourth Proportional to 11,425.32, 15,774.48 and 8,786.52

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Solution

The fourth proportional to 11,425.32, 15,774.48 and 8,786.52 is: 12,131.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,425.32 : 15,774.48 = 8,786.52 : x
  2. Step 2: Convert to fraction form
    11,425.32/15,774.48 = 8,786.52/x
  3. Step 3: Cross multiply
    11,425.32x = 15,774.48 × 8,786.52
  4. Step 4: Simplify right side
    11,425.32x = 138,602,784.01
  5. Step 5: Solve for x
    x = 138,602,784.01/11,425.32
  6. Step 6: Final answer
    x = 12,131.19

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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.