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Finding the Fourth Proportional to 38,969.65, 58,459.65 and 12,665.53

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Solution

The fourth proportional to 38,969.65, 58,459.65 and 12,665.53 is: 18,999.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,969.65 : 58,459.65 = 12,665.53 : x
  2. Step 2: Convert to fraction form
    38,969.65/58,459.65 = 12,665.53/x
  3. Step 3: Cross multiply
    38,969.65x = 58,459.65 × 12,665.53
  4. Step 4: Simplify right side
    38,969.65x = 740,422,450.86
  5. Step 5: Solve for x
    x = 740,422,450.86/38,969.65
  6. Step 6: Final answer
    x = 18,999.98

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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.