Home / 8,420.29-12,641.37-6,473.86

Finding the Fourth Proportional to 8,420.29, 12,641.37 and 6,473.86

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Solution

The fourth proportional to 8,420.29, 12,641.37 and 6,473.86 is: 9,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.29 : 12,641.37 = 6,473.86 : x
  2. Step 2: Convert to fraction form
    8,420.29/12,641.37 = 6,473.86/x
  3. Step 3: Cross multiply
    8,420.29x = 12,641.37 × 6,473.86
  4. Step 4: Simplify right side
    8,420.29x = 81,838,459.59
  5. Step 5: Solve for x
    x = 81,838,459.59/8,420.29
  6. Step 6: Final answer
    x = 9,719.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.