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Finding the Fourth Proportional to 27,798.61, 38,362.11 and 15,865.79

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Solution

The fourth proportional to 27,798.61, 38,362.11 and 15,865.79 is: 21,894.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,798.61 : 38,362.11 = 15,865.79 : x
  2. Step 2: Convert to fraction form
    27,798.61/38,362.11 = 15,865.79/x
  3. Step 3: Cross multiply
    27,798.61x = 38,362.11 × 15,865.79
  4. Step 4: Simplify right side
    27,798.61x = 608,645,145.70
  5. Step 5: Solve for x
    x = 608,645,145.70/27,798.61
  6. Step 6: Final answer
    x = 21,894.81

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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.