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Finding the Fourth Proportional to 7,999.49, 12,001.05 and 3,071.45

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Solution

The fourth proportional to 7,999.49, 12,001.05 and 3,071.45 is: 4,607.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.49 : 12,001.05 = 3,071.45 : x
  2. Step 2: Convert to fraction form
    7,999.49/12,001.05 = 3,071.45/x
  3. Step 3: Cross multiply
    7,999.49x = 12,001.05 × 3,071.45
  4. Step 4: Simplify right side
    7,999.49x = 36,860,565.02
  5. Step 5: Solve for x
    x = 36,860,565.02/7,999.49
  6. Step 6: Final answer
    x = 4,607.87

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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.