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Finding the Fourth Proportional to 10,955.66, 15,087.02 and 9,519.38

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Solution

The fourth proportional to 10,955.66, 15,087.02 and 9,519.38 is: 13,109.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.66 : 15,087.02 = 9,519.38 : x
  2. Step 2: Convert to fraction form
    10,955.66/15,087.02 = 9,519.38/x
  3. Step 3: Cross multiply
    10,955.66x = 15,087.02 × 9,519.38
  4. Step 4: Simplify right side
    10,955.66x = 143,618,953.42
  5. Step 5: Solve for x
    x = 143,618,953.42/10,955.66
  6. Step 6: Final answer
    x = 13,109.11

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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.