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Finding the Fourth Proportional to 19,881.56, 27,436.20 and 10,928.99

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Solution

The fourth proportional to 19,881.56, 27,436.20 and 10,928.99 is: 15,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.56 : 27,436.20 = 10,928.99 : x
  2. Step 2: Convert to fraction form
    19,881.56/27,436.20 = 10,928.99/x
  3. Step 3: Cross multiply
    19,881.56x = 27,436.20 × 10,928.99
  4. Step 4: Simplify right side
    19,881.56x = 299,849,818.26
  5. Step 5: Solve for x
    x = 299,849,818.26/19,881.56
  6. Step 6: Final answer
    x = 15,081.81

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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.