Home / 8,423.78-11,620.41-6,430.88

Finding the Fourth Proportional to 8,423.78, 11,620.41 and 6,430.88

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Solution

The fourth proportional to 8,423.78, 11,620.41 and 6,430.88 is: 8,871.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,423.78 : 11,620.41 = 6,430.88 : x
  2. Step 2: Convert to fraction form
    8,423.78/11,620.41 = 6,430.88/x
  3. Step 3: Cross multiply
    8,423.78x = 11,620.41 × 6,430.88
  4. Step 4: Simplify right side
    8,423.78x = 74,729,462.26
  5. Step 5: Solve for x
    x = 74,729,462.26/8,423.78
  6. Step 6: Final answer
    x = 8,871.25

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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.