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Finding the Fourth Proportional to 7,210.64, 9,949.56 and 4,066.76

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Solution

The fourth proportional to 7,210.64, 9,949.56 and 4,066.76 is: 5,611.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,210.64 : 9,949.56 = 4,066.76 : x
  2. Step 2: Convert to fraction form
    7,210.64/9,949.56 = 4,066.76/x
  3. Step 3: Cross multiply
    7,210.64x = 9,949.56 × 4,066.76
  4. Step 4: Simplify right side
    7,210.64x = 40,462,472.63
  5. Step 5: Solve for x
    x = 40,462,472.63/7,210.64
  6. Step 6: Final answer
    x = 5,611.50

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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.