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Finding the Fourth Proportional to 20,306.40, 30,448.80 and 8,606.40

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Solution

The fourth proportional to 20,306.40, 30,448.80 and 8,606.40 is: 12,905.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.40 : 30,448.80 = 8,606.40 : x
  2. Step 2: Convert to fraction form
    20,306.40/30,448.80 = 8,606.40/x
  3. Step 3: Cross multiply
    20,306.40x = 30,448.80 × 8,606.40
  4. Step 4: Simplify right side
    20,306.40x = 262,054,552.32
  5. Step 5: Solve for x
    x = 262,054,552.32/20,306.40
  6. Step 6: Final answer
    x = 12,905.02

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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.