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Finding the Fourth Proportional to 12,653.76, 17,462.20 and 7,064.76

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Solution

The fourth proportional to 12,653.76, 17,462.20 and 7,064.76 is: 9,749.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.76 : 17,462.20 = 7,064.76 : x
  2. Step 2: Convert to fraction form
    12,653.76/17,462.20 = 7,064.76/x
  3. Step 3: Cross multiply
    12,653.76x = 17,462.20 × 7,064.76
  4. Step 4: Simplify right side
    12,653.76x = 123,366,252.07
  5. Step 5: Solve for x
    x = 123,366,252.07/12,653.76
  6. Step 6: Final answer
    x = 9,749.38

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Half scale
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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.