Home / 8,385.46-12,574.74-3,120.81

Finding the Fourth Proportional to 8,385.46, 12,574.74 and 3,120.81

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Solution

The fourth proportional to 8,385.46, 12,574.74 and 3,120.81 is: 4,679.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.46 : 12,574.74 = 3,120.81 : x
  2. Step 2: Convert to fraction form
    8,385.46/12,574.74 = 3,120.81/x
  3. Step 3: Cross multiply
    8,385.46x = 12,574.74 × 3,120.81
  4. Step 4: Simplify right side
    8,385.46x = 39,243,374.34
  5. Step 5: Solve for x
    x = 39,243,374.34/8,385.46
  6. Step 6: Final answer
    x = 4,679.93

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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.