Home / 8,420.57-11,622.63-4,974.18

Finding the Fourth Proportional to 8,420.57, 11,622.63 and 4,974.18

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Solution

The fourth proportional to 8,420.57, 11,622.63 and 4,974.18 is: 6,865.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.57 : 11,622.63 = 4,974.18 : x
  2. Step 2: Convert to fraction form
    8,420.57/11,622.63 = 4,974.18/x
  3. Step 3: Cross multiply
    8,420.57x = 11,622.63 × 4,974.18
  4. Step 4: Simplify right side
    8,420.57x = 57,813,028.76
  5. Step 5: Solve for x
    x = 57,813,028.76/8,420.57
  6. Step 6: Final answer
    x = 6,865.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.