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Finding the Fourth Proportional to 9,919.61, 14,879.72 and 4,989.44

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Solution

The fourth proportional to 9,919.61, 14,879.72 and 4,989.44 is: 7,484.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.61 : 14,879.72 = 4,989.44 : x
  2. Step 2: Convert to fraction form
    9,919.61/14,879.72 = 4,989.44/x
  3. Step 3: Cross multiply
    9,919.61x = 14,879.72 × 4,989.44
  4. Step 4: Simplify right side
    9,919.61x = 74,241,482.41
  5. Step 5: Solve for x
    x = 74,241,482.41/9,919.61
  6. Step 6: Final answer
    x = 7,484.32

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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.