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Finding the Fourth Proportional to 20,412.40, 30,612.52 and 7,934.36

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Solution

The fourth proportional to 20,412.40, 30,612.52 and 7,934.36 is: 11,899.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.40 : 30,612.52 = 7,934.36 : x
  2. Step 2: Convert to fraction form
    20,412.40/30,612.52 = 7,934.36/x
  3. Step 3: Cross multiply
    20,412.40x = 30,612.52 × 7,934.36
  4. Step 4: Simplify right side
    20,412.40x = 242,890,754.19
  5. Step 5: Solve for x
    x = 242,890,754.19/20,412.40
  6. Step 6: Final answer
    x = 11,899.18

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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.