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Finding the Fourth Proportional to 27,888.38, 38,486.38 and 15,313.12

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Solution

The fourth proportional to 27,888.38, 38,486.38 and 15,313.12 is: 21,132.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,888.38 : 38,486.38 = 15,313.12 : x
  2. Step 2: Convert to fraction form
    27,888.38/38,486.38 = 15,313.12/x
  3. Step 3: Cross multiply
    27,888.38x = 38,486.38 × 15,313.12
  4. Step 4: Simplify right side
    27,888.38x = 589,346,555.31
  5. Step 5: Solve for x
    x = 589,346,555.31/27,888.38
  6. Step 6: Final answer
    x = 21,132.33

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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.