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Finding the Fourth Proportional to 9,171, 12,655.98 and 4,979.34

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Solution

The fourth proportional to 9,171, 12,655.98 and 4,979.34 is: 6,871.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,171 : 12,655.98 = 4,979.34 : x
  2. Step 2: Convert to fraction form
    9,171/12,655.98 = 4,979.34/x
  3. Step 3: Cross multiply
    9,171x = 12,655.98 × 4,979.34
  4. Step 4: Simplify right side
    9,171x = 63,018,427.45
  5. Step 5: Solve for x
    x = 63,018,427.45/9,171
  6. Step 6: Final answer
    x = 6,871.49

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Double 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.