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Finding the Fourth Proportional to 6,619.60, 9,920.16 and 3,659.46

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Solution

The fourth proportional to 6,619.60, 9,920.16 and 3,659.46 is: 5,484.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,619.60 : 9,920.16 = 3,659.46 : x
  2. Step 2: Convert to fraction form
    6,619.60/9,920.16 = 3,659.46/x
  3. Step 3: Cross multiply
    6,619.60x = 9,920.16 × 3,659.46
  4. Step 4: Simplify right side
    6,619.60x = 36,302,428.71
  5. Step 5: Solve for x
    x = 36,302,428.71/6,619.60
  6. Step 6: Final answer
    x = 5,484.08

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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.