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Finding the Fourth Proportional to 21,030.27, 31,544.99 and 5,447.49

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Solution

The fourth proportional to 21,030.27, 31,544.99 and 5,447.49 is: 8,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.27 : 31,544.99 = 5,447.49 : x
  2. Step 2: Convert to fraction form
    21,030.27/31,544.99 = 5,447.49/x
  3. Step 3: Cross multiply
    21,030.27x = 31,544.99 × 5,447.49
  4. Step 4: Simplify right side
    21,030.27x = 171,841,017.58
  5. Step 5: Solve for x
    x = 171,841,017.58/21,030.27
  6. Step 6: Final answer
    x = 8,171.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.