Home / 8,969.48-12,376.96-4,990.20

Finding the Fourth Proportional to 8,969.48, 12,376.96 and 4,990.20

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Solution

The fourth proportional to 8,969.48, 12,376.96 and 4,990.20 is: 6,885.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.48 : 12,376.96 = 4,990.20 : x
  2. Step 2: Convert to fraction form
    8,969.48/12,376.96 = 4,990.20/x
  3. Step 3: Cross multiply
    8,969.48x = 12,376.96 × 4,990.20
  4. Step 4: Simplify right side
    8,969.48x = 61,763,505.79
  5. Step 5: Solve for x
    x = 61,763,505.79/8,969.48
  6. Step 6: Final answer
    x = 6,885.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.