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Finding the Fourth Proportional to 8,911.56, 13,427.52 and 7,385.52

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Solution

The fourth proportional to 8,911.56, 13,427.52 and 7,385.52 is: 11,128.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.56 : 13,427.52 = 7,385.52 : x
  2. Step 2: Convert to fraction form
    8,911.56/13,427.52 = 7,385.52/x
  3. Step 3: Cross multiply
    8,911.56x = 13,427.52 × 7,385.52
  4. Step 4: Simplify right side
    8,911.56x = 99,169,217.51
  5. Step 5: Solve for x
    x = 99,169,217.51/8,911.56
  6. Step 6: Final answer
    x = 11,128.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.