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Finding the Fourth Proportional to 15,886.92, 21,924.99 and 9,172.83

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Solution

The fourth proportional to 15,886.92, 21,924.99 and 9,172.83 is: 12,659.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.92 : 21,924.99 = 9,172.83 : x
  2. Step 2: Convert to fraction form
    15,886.92/21,924.99 = 9,172.83/x
  3. Step 3: Cross multiply
    15,886.92x = 21,924.99 × 9,172.83
  4. Step 4: Simplify right side
    15,886.92x = 201,114,206.02
  5. Step 5: Solve for x
    x = 201,114,206.02/15,886.92
  6. Step 6: Final answer
    x = 12,659.11

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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.