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Finding the Fourth Proportional to 19,888.62, 27,450.71 and 15,573.13

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Solution

The fourth proportional to 19,888.62, 27,450.71 and 15,573.13 is: 21,494.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.62 : 27,450.71 = 15,573.13 : x
  2. Step 2: Convert to fraction form
    19,888.62/27,450.71 = 15,573.13/x
  3. Step 3: Cross multiply
    19,888.62x = 27,450.71 × 15,573.13
  4. Step 4: Simplify right side
    19,888.62x = 427,493,475.42
  5. Step 5: Solve for x
    x = 427,493,475.42/19,888.62
  6. Step 6: Final answer
    x = 21,494.38

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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.