Home / 8,905.63-12,295.37-5,720.21

Finding the Fourth Proportional to 8,905.63, 12,295.37 and 5,720.21

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Solution

The fourth proportional to 8,905.63, 12,295.37 and 5,720.21 is: 7,897.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.63 : 12,295.37 = 5,720.21 : x
  2. Step 2: Convert to fraction form
    8,905.63/12,295.37 = 5,720.21/x
  3. Step 3: Cross multiply
    8,905.63x = 12,295.37 × 5,720.21
  4. Step 4: Simplify right side
    8,905.63x = 70,332,098.43
  5. Step 5: Solve for x
    x = 70,332,098.43/8,905.63
  6. Step 6: Final answer
    x = 7,897.49

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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.