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Finding the Fourth Proportional to 12,998.61, 19,499.29 and 4,234.21

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Solution

The fourth proportional to 12,998.61, 19,499.29 and 4,234.21 is: 6,351.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,998.61 : 19,499.29 = 4,234.21 : x
  2. Step 2: Convert to fraction form
    12,998.61/19,499.29 = 4,234.21/x
  3. Step 3: Cross multiply
    12,998.61x = 19,499.29 × 4,234.21
  4. Step 4: Simplify right side
    12,998.61x = 82,564,088.71
  5. Step 5: Solve for x
    x = 82,564,088.71/12,998.61
  6. Step 6: Final answer
    x = 6,351.76

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.