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Finding the Fourth Proportional to 9,990.83, 14,988.36 and 2,970.86

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Solution

The fourth proportional to 9,990.83, 14,988.36 and 2,970.86 is: 4,456.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.83 : 14,988.36 = 2,970.86 : x
  2. Step 2: Convert to fraction form
    9,990.83/14,988.36 = 2,970.86/x
  3. Step 3: Cross multiply
    9,990.83x = 14,988.36 × 2,970.86
  4. Step 4: Simplify right side
    9,990.83x = 44,528,244.25
  5. Step 5: Solve for x
    x = 44,528,244.25/9,990.83
  6. Step 6: Final answer
    x = 4,456.91

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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.