Home / 6,420.48-8,859.36-3,587.20

Finding the Fourth Proportional to 6,420.48, 8,859.36 and 3,587.20

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Solution

The fourth proportional to 6,420.48, 8,859.36 and 3,587.20 is: 4,949.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.48 : 8,859.36 = 3,587.20 : x
  2. Step 2: Convert to fraction form
    6,420.48/8,859.36 = 3,587.20/x
  3. Step 3: Cross multiply
    6,420.48x = 8,859.36 × 3,587.20
  4. Step 4: Simplify right side
    6,420.48x = 31,780,296.19
  5. Step 5: Solve for x
    x = 31,780,296.19/6,420.48
  6. Step 6: Final answer
    x = 4,949.83

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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.