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Finding the Fourth Proportional to 45,856.40, 68,815.12 and 18,860.90

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Solution

The fourth proportional to 45,856.40, 68,815.12 and 18,860.90 is: 28,303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,856.40 : 68,815.12 = 18,860.90 : x
  2. Step 2: Convert to fraction form
    45,856.40/68,815.12 = 18,860.90/x
  3. Step 3: Cross multiply
    45,856.40x = 68,815.12 × 18,860.90
  4. Step 4: Simplify right side
    45,856.40x = 1,297,915,096.81
  5. Step 5: Solve for x
    x = 1,297,915,096.81/45,856.40
  6. Step 6: Final answer
    x = 28,303.90

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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.