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Finding the Fourth Proportional to 9,915.56, 14,873.36 and 2,990.06

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Solution

The fourth proportional to 9,915.56, 14,873.36 and 2,990.06 is: 4,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.56 : 14,873.36 = 2,990.06 : x
  2. Step 2: Convert to fraction form
    9,915.56/14,873.36 = 2,990.06/x
  3. Step 3: Cross multiply
    9,915.56x = 14,873.36 × 2,990.06
  4. Step 4: Simplify right side
    9,915.56x = 44,472,261.03
  5. Step 5: Solve for x
    x = 44,472,261.03/9,915.56
  6. Step 6: Final answer
    x = 4,485.10

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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.