Home / 10,211.15-15,317.12-3,191.81

Finding the Fourth Proportional to 10,211.15, 15,317.12 and 3,191.81

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Solution

The fourth proportional to 10,211.15, 15,317.12 and 3,191.81 is: 4,787.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,211.15 : 15,317.12 = 3,191.81 : x
  2. Step 2: Convert to fraction form
    10,211.15/15,317.12 = 3,191.81/x
  3. Step 3: Cross multiply
    10,211.15x = 15,317.12 × 3,191.81
  4. Step 4: Simplify right side
    10,211.15x = 48,889,320.83
  5. Step 5: Solve for x
    x = 48,889,320.83/10,211.15
  6. Step 6: Final answer
    x = 4,787.84

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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.