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Finding the Fourth Proportional to 20,157.40, 30,218.80 and 7,008.08

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Solution

The fourth proportional to 20,157.40, 30,218.80 and 7,008.08 is: 10,506.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157.40 : 30,218.80 = 7,008.08 : x
  2. Step 2: Convert to fraction form
    20,157.40/30,218.80 = 7,008.08/x
  3. Step 3: Cross multiply
    20,157.40x = 30,218.80 × 7,008.08
  4. Step 4: Simplify right side
    20,157.40x = 211,775,767.90
  5. Step 5: Solve for x
    x = 211,775,767.90/20,157.40
  6. Step 6: Final answer
    x = 10,506.11

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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.