Home / 12,909.96-19,316.00-7,647.80

Finding the Fourth Proportional to 12,909.96, 19,316.00 and 7,647.80

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Solution

The fourth proportional to 12,909.96, 19,316.00 and 7,647.80 is: 11,442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.96 : 19,316.00 = 7,647.80 : x
  2. Step 2: Convert to fraction form
    12,909.96/19,316.00 = 7,647.80/x
  3. Step 3: Cross multiply
    12,909.96x = 19,316.00 × 7,647.80
  4. Step 4: Simplify right side
    12,909.96x = 147,724,827.34
  5. Step 5: Solve for x
    x = 147,724,827.34/12,909.96
  6. Step 6: Final answer
    x = 11,442.70

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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.