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Finding the Fourth Proportional to 19,481.87, 26,886.63 and 10,985.63

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Solution

The fourth proportional to 19,481.87, 26,886.63 and 10,985.63 is: 15,161.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,481.87 : 26,886.63 = 10,985.63 : x
  2. Step 2: Convert to fraction form
    19,481.87/26,886.63 = 10,985.63/x
  3. Step 3: Cross multiply
    19,481.87x = 26,886.63 × 10,985.63
  4. Step 4: Simplify right side
    19,481.87x = 295,366,569.13
  5. Step 5: Solve for x
    x = 295,366,569.13/19,481.87
  6. Step 6: Final answer
    x = 15,161.10

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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.