Home / 6,421.41-8,864.10-4,185.20

Finding the Fourth Proportional to 6,421.41, 8,864.10 and 4,185.20

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Solution

The fourth proportional to 6,421.41, 8,864.10 and 4,185.20 is: 5,777.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.41 : 8,864.10 = 4,185.20 : x
  2. Step 2: Convert to fraction form
    6,421.41/8,864.10 = 4,185.20/x
  3. Step 3: Cross multiply
    6,421.41x = 8,864.10 × 4,185.20
  4. Step 4: Simplify right side
    6,421.41x = 37,098,053.48
  5. Step 5: Solve for x
    x = 37,098,053.48/6,421.41
  6. Step 6: Final answer
    x = 5,777.24

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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.