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Finding the Fourth Proportional to 9,994.60, 14,979.90 and 4,148.20

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Solution

The fourth proportional to 9,994.60, 14,979.90 and 4,148.20 is: 6,217.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,994.60 : 14,979.90 = 4,148.20 : x
  2. Step 2: Convert to fraction form
    9,994.60/14,979.90 = 4,148.20/x
  3. Step 3: Cross multiply
    9,994.60x = 14,979.90 × 4,148.20
  4. Step 4: Simplify right side
    9,994.60x = 62,139,621.18
  5. Step 5: Solve for x
    x = 62,139,621.18/9,994.60
  6. Step 6: Final answer
    x = 6,217.32

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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.