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Finding the Fourth Proportional to 9,915.52, 14,873.04 and 2,990

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Solution

The fourth proportional to 9,915.52, 14,873.04 and 2,990 is: 4,484.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.52 : 14,873.04 = 2,990 : x
  2. Step 2: Convert to fraction form
    9,915.52/14,873.04 = 2,990/x
  3. Step 3: Cross multiply
    9,915.52x = 14,873.04 × 2,990
  4. Step 4: Simplify right side
    9,915.52x = 44,470,389.60
  5. Step 5: Solve for x
    x = 44,470,389.60/9,915.52
  6. Step 6: Final answer
    x = 4,484.93

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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.