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Finding the Fourth Proportional to 27,888.69, 38,486.11 and 15,141.99

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Solution

The fourth proportional to 27,888.69, 38,486.11 and 15,141.99 is: 20,895.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,888.69 : 38,486.11 = 15,141.99 : x
  2. Step 2: Convert to fraction form
    27,888.69/38,486.11 = 15,141.99/x
  3. Step 3: Cross multiply
    27,888.69x = 38,486.11 × 15,141.99
  4. Step 4: Simplify right side
    27,888.69x = 582,756,292.76
  5. Step 5: Solve for x
    x = 582,756,292.76/27,888.69
  6. Step 6: Final answer
    x = 20,895.79

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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.