Home / 8,620.47-12,905.19-5,322.96

Finding the Fourth Proportional to 8,620.47, 12,905.19 and 5,322.96

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Solution

The fourth proportional to 8,620.47, 12,905.19 and 5,322.96 is: 7,968.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.47 : 12,905.19 = 5,322.96 : x
  2. Step 2: Convert to fraction form
    8,620.47/12,905.19 = 5,322.96/x
  3. Step 3: Cross multiply
    8,620.47x = 12,905.19 × 5,322.96
  4. Step 4: Simplify right side
    8,620.47x = 68,693,810.16
  5. Step 5: Solve for x
    x = 68,693,810.16/8,620.47
  6. Step 6: Final answer
    x = 7,968.69

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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.