Home / 11,115.84-15,307.20-9,936.48

Finding the Fourth Proportional to 11,115.84, 15,307.20 and 9,936.48

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Solution

The fourth proportional to 11,115.84, 15,307.20 and 9,936.48 is: 13,683.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.84 : 15,307.20 = 9,936.48 : x
  2. Step 2: Convert to fraction form
    11,115.84/15,307.20 = 9,936.48/x
  3. Step 3: Cross multiply
    11,115.84x = 15,307.20 × 9,936.48
  4. Step 4: Simplify right side
    11,115.84x = 152,099,686.66
  5. Step 5: Solve for x
    x = 152,099,686.66/11,115.84
  6. Step 6: Final answer
    x = 13,683.15

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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.