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Finding the Fourth Proportional to 19,993.16, 30,008.30 and 10,139.40

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Solution

The fourth proportional to 19,993.16, 30,008.30 and 10,139.40 is: 15,218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,993.16 : 30,008.30 = 10,139.40 : x
  2. Step 2: Convert to fraction form
    19,993.16/30,008.30 = 10,139.40/x
  3. Step 3: Cross multiply
    19,993.16x = 30,008.30 × 10,139.40
  4. Step 4: Simplify right side
    19,993.16x = 304,266,157.02
  5. Step 5: Solve for x
    x = 304,266,157.02/19,993.16
  6. Step 6: Final answer
    x = 15,218.51

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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.