Home / 5,129.61-7,684.74-2,931.72

Finding the Fourth Proportional to 5,129.61, 7,684.74 and 2,931.72

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Solution

The fourth proportional to 5,129.61, 7,684.74 and 2,931.72 is: 4,392.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.61 : 7,684.74 = 2,931.72 : x
  2. Step 2: Convert to fraction form
    5,129.61/7,684.74 = 2,931.72/x
  3. Step 3: Cross multiply
    5,129.61x = 7,684.74 × 2,931.72
  4. Step 4: Simplify right side
    5,129.61x = 22,529,505.95
  5. Step 5: Solve for x
    x = 22,529,505.95/5,129.61
  6. Step 6: Final answer
    x = 4,392.05

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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.