Home / 4,779.81-7,168.10-2,931.80

Finding the Fourth Proportional to 4,779.81, 7,168.10 and 2,931.80

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Solution

The fourth proportional to 4,779.81, 7,168.10 and 2,931.80 is: 4,396.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,779.81 : 7,168.10 = 2,931.80 : x
  2. Step 2: Convert to fraction form
    4,779.81/7,168.10 = 2,931.80/x
  3. Step 3: Cross multiply
    4,779.81x = 7,168.10 × 2,931.80
  4. Step 4: Simplify right side
    4,779.81x = 21,015,385.08
  5. Step 5: Solve for x
    x = 21,015,385.08/4,779.81
  6. Step 6: Final answer
    x = 4,396.70

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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.