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Finding the Fourth Proportional to 6,505.95, 8,978.16 and 3,521.72

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Solution

The fourth proportional to 6,505.95, 8,978.16 and 3,521.72 is: 4,859.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,505.95 : 8,978.16 = 3,521.72 : x
  2. Step 2: Convert to fraction form
    6,505.95/8,978.16 = 3,521.72/x
  3. Step 3: Cross multiply
    6,505.95x = 8,978.16 × 3,521.72
  4. Step 4: Simplify right side
    6,505.95x = 31,618,520.74
  5. Step 5: Solve for x
    x = 31,618,520.74/6,505.95
  6. Step 6: Final answer
    x = 4,859.94

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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.