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Finding the Fourth Proportional to 19,881.91, 27,436.53 and 10,806.99

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Solution

The fourth proportional to 19,881.91, 27,436.53 and 10,806.99 is: 14,913.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.91 : 27,436.53 = 10,806.99 : x
  2. Step 2: Convert to fraction form
    19,881.91/27,436.53 = 10,806.99/x
  3. Step 3: Cross multiply
    19,881.91x = 27,436.53 × 10,806.99
  4. Step 4: Simplify right side
    19,881.91x = 296,506,305.34
  5. Step 5: Solve for x
    x = 296,506,305.34/19,881.91
  6. Step 6: Final answer
    x = 14,913.37

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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.