Home / 6,420.65-8,859.62-3,587.66

Finding the Fourth Proportional to 6,420.65, 8,859.62 and 3,587.66

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Solution

The fourth proportional to 6,420.65, 8,859.62 and 3,587.66 is: 4,950.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.65 : 8,859.62 = 3,587.66 : x
  2. Step 2: Convert to fraction form
    6,420.65/8,859.62 = 3,587.66/x
  3. Step 3: Cross multiply
    6,420.65x = 8,859.62 × 3,587.66
  4. Step 4: Simplify right side
    6,420.65x = 31,785,321.95
  5. Step 5: Solve for x
    x = 31,785,321.95/6,420.65
  6. Step 6: Final answer
    x = 4,950.49

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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.