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Finding the Fourth Proportional to 9,989.54, 14,979.53 and 4,720.15

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Solution

The fourth proportional to 9,989.54, 14,979.53 and 4,720.15 is: 7,077.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.54 : 14,979.53 = 4,720.15 : x
  2. Step 2: Convert to fraction form
    9,989.54/14,979.53 = 4,720.15/x
  3. Step 3: Cross multiply
    9,989.54x = 14,979.53 × 4,720.15
  4. Step 4: Simplify right side
    9,989.54x = 70,705,628.53
  5. Step 5: Solve for x
    x = 70,705,628.53/9,989.54
  6. Step 6: Final answer
    x = 7,077.97

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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.