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Finding the Fourth Proportional to 15,892.68, 21,933.78 and 10,855.28

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Solution

The fourth proportional to 15,892.68, 21,933.78 and 10,855.28 is: 14,981.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.68 : 21,933.78 = 10,855.28 : x
  2. Step 2: Convert to fraction form
    15,892.68/21,933.78 = 10,855.28/x
  3. Step 3: Cross multiply
    15,892.68x = 21,933.78 × 10,855.28
  4. Step 4: Simplify right side
    15,892.68x = 238,097,323.36
  5. Step 5: Solve for x
    x = 238,097,323.36/15,892.68
  6. Step 6: Final answer
    x = 14,981.57

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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.