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Finding the Fourth Proportional to 19,889.35, 27,447.85 and 10,815.35

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Solution

The fourth proportional to 19,889.35, 27,447.85 and 10,815.35 is: 14,925.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.35 : 27,447.85 = 10,815.35 : x
  2. Step 2: Convert to fraction form
    19,889.35/27,447.85 = 10,815.35/x
  3. Step 3: Cross multiply
    19,889.35x = 27,447.85 × 10,815.35
  4. Step 4: Simplify right side
    19,889.35x = 296,858,146.08
  5. Step 5: Solve for x
    x = 296,858,146.08/19,889.35
  6. Step 6: Final answer
    x = 14,925.48

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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.