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Finding the Fourth Proportional to 11,355.12, 15,661.18 and 7,377.51

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Solution

The fourth proportional to 11,355.12, 15,661.18 and 7,377.51 is: 10,175.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.12 : 15,661.18 = 7,377.51 : x
  2. Step 2: Convert to fraction form
    11,355.12/15,661.18 = 7,377.51/x
  3. Step 3: Cross multiply
    11,355.12x = 15,661.18 × 7,377.51
  4. Step 4: Simplify right side
    11,355.12x = 115,540,512.06
  5. Step 5: Solve for x
    x = 115,540,512.06/11,355.12
  6. Step 6: Final answer
    x = 10,175.19

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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.