Home / 6,623.60-9,135.06-3,970.40

Finding the Fourth Proportional to 6,623.60, 9,135.06 and 3,970.40

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Solution

The fourth proportional to 6,623.60, 9,135.06 and 3,970.40 is: 5,475.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.60 : 9,135.06 = 3,970.40 : x
  2. Step 2: Convert to fraction form
    6,623.60/9,135.06 = 3,970.40/x
  3. Step 3: Cross multiply
    6,623.60x = 9,135.06 × 3,970.40
  4. Step 4: Simplify right side
    6,623.60x = 36,269,842.22
  5. Step 5: Solve for x
    x = 36,269,842.22/6,623.60
  6. Step 6: Final answer
    x = 5,475.85

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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.