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Finding the Fourth Proportional to 7,712.69, 10,643.12 and 4,309.10

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Solution

The fourth proportional to 7,712.69, 10,643.12 and 4,309.10 is: 5,946.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,712.69 : 10,643.12 = 4,309.10 : x
  2. Step 2: Convert to fraction form
    7,712.69/10,643.12 = 4,309.10/x
  3. Step 3: Cross multiply
    7,712.69x = 10,643.12 × 4,309.10
  4. Step 4: Simplify right side
    7,712.69x = 45,862,261.82
  5. Step 5: Solve for x
    x = 45,862,261.82/7,712.69
  6. Step 6: Final answer
    x = 5,946.34

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Double scale
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Similar ratio
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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.