Home / 4,989.40-7,484.10-3,118.30

Finding the Fourth Proportional to 4,989.40, 7,484.10 and 3,118.30

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Solution

The fourth proportional to 4,989.40, 7,484.10 and 3,118.30 is: 4,677.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.40 : 7,484.10 = 3,118.30 : x
  2. Step 2: Convert to fraction form
    4,989.40/7,484.10 = 3,118.30/x
  3. Step 3: Cross multiply
    4,989.40x = 7,484.10 × 3,118.30
  4. Step 4: Simplify right side
    4,989.40x = 23,337,669.03
  5. Step 5: Solve for x
    x = 23,337,669.03/4,989.40
  6. Step 6: Final answer
    x = 4,677.45

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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.