Home / 9,420.92-12,985.70-6,395.12

Finding the Fourth Proportional to 9,420.92, 12,985.70 and 6,395.12

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Solution

The fourth proportional to 9,420.92, 12,985.70 and 6,395.12 is: 8,814.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.92 : 12,985.70 = 6,395.12 : x
  2. Step 2: Convert to fraction form
    9,420.92/12,985.70 = 6,395.12/x
  3. Step 3: Cross multiply
    9,420.92x = 12,985.70 × 6,395.12
  4. Step 4: Simplify right side
    9,420.92x = 83,045,061.58
  5. Step 5: Solve for x
    x = 83,045,061.58/9,420.92
  6. Step 6: Final answer
    x = 8,814.96

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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.