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Finding the Fourth Proportional to 7,621.92, 10,518.96 and 7,026.30

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Solution

The fourth proportional to 7,621.92, 10,518.96 and 7,026.30 is: 9,696.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.92 : 10,518.96 = 7,026.30 : x
  2. Step 2: Convert to fraction form
    7,621.92/10,518.96 = 7,026.30/x
  3. Step 3: Cross multiply
    7,621.92x = 10,518.96 × 7,026.30
  4. Step 4: Simplify right side
    7,621.92x = 73,909,368.65
  5. Step 5: Solve for x
    x = 73,909,368.65/7,621.92
  6. Step 6: Final answer
    x = 9,696.95

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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.