Home / 10,621.78-14,662.12-7,083.70

Finding the Fourth Proportional to 10,621.78, 14,662.12 and 7,083.70

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Solution

The fourth proportional to 10,621.78, 14,662.12 and 7,083.70 is: 9,778.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,621.78 : 14,662.12 = 7,083.70 : x
  2. Step 2: Convert to fraction form
    10,621.78/14,662.12 = 7,083.70/x
  3. Step 3: Cross multiply
    10,621.78x = 14,662.12 × 7,083.70
  4. Step 4: Simplify right side
    10,621.78x = 103,862,059.44
  5. Step 5: Solve for x
    x = 103,862,059.44/10,621.78
  6. Step 6: Final answer
    x = 9,778.22

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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.