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Finding the Fourth Proportional to 7,111.84, 10,605.08 and 6,619.36

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Solution

The fourth proportional to 7,111.84, 10,605.08 and 6,619.36 is: 9,870.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.84 : 10,605.08 = 6,619.36 : x
  2. Step 2: Convert to fraction form
    7,111.84/10,605.08 = 6,619.36/x
  3. Step 3: Cross multiply
    7,111.84x = 10,605.08 × 6,619.36
  4. Step 4: Simplify right side
    7,111.84x = 70,198,842.35
  5. Step 5: Solve for x
    x = 70,198,842.35/7,111.84
  6. Step 6: Final answer
    x = 9,870.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.