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Finding the Fourth Proportional to 19,974.16, 29,785.01 and 18,993.12

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Solution

The fourth proportional to 19,974.16, 29,785.01 and 18,993.12 is: 28,322.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,974.16 : 29,785.01 = 18,993.12 : x
  2. Step 2: Convert to fraction form
    19,974.16/29,785.01 = 18,993.12/x
  3. Step 3: Cross multiply
    19,974.16x = 29,785.01 × 18,993.12
  4. Step 4: Simplify right side
    19,974.16x = 565,710,269.13
  5. Step 5: Solve for x
    x = 565,710,269.13/19,974.16
  6. Step 6: Final answer
    x = 28,322.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.