Home / 6,623.20-9,140.28-3,639.28

Finding the Fourth Proportional to 6,623.20, 9,140.28 and 3,639.28

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Solution

The fourth proportional to 6,623.20, 9,140.28 and 3,639.28 is: 5,022.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.20 : 9,140.28 = 3,639.28 : x
  2. Step 2: Convert to fraction form
    6,623.20/9,140.28 = 3,639.28/x
  3. Step 3: Cross multiply
    6,623.20x = 9,140.28 × 3,639.28
  4. Step 4: Simplify right side
    6,623.20x = 33,264,038.20
  5. Step 5: Solve for x
    x = 33,264,038.20/6,623.20
  6. Step 6: Final answer
    x = 5,022.35

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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.