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Finding the Fourth Proportional to 8,564.04, 12,783.57 and 7,939.08

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Solution

The fourth proportional to 8,564.04, 12,783.57 and 7,939.08 is: 11,850.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,564.04 : 12,783.57 = 7,939.08 : x
  2. Step 2: Convert to fraction form
    8,564.04/12,783.57 = 7,939.08/x
  3. Step 3: Cross multiply
    8,564.04x = 12,783.57 × 7,939.08
  4. Step 4: Simplify right side
    8,564.04x = 101,489,784.92
  5. Step 5: Solve for x
    x = 101,489,784.92/8,564.04
  6. Step 6: Final answer
    x = 11,850.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.