Home / 13,385.70-18,471.77-7,720.69

Finding the Fourth Proportional to 13,385.70, 18,471.77 and 7,720.69

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Solution

The fourth proportional to 13,385.70, 18,471.77 and 7,720.69 is: 10,654.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.70 : 18,471.77 = 7,720.69 : x
  2. Step 2: Convert to fraction form
    13,385.70/18,471.77 = 7,720.69/x
  3. Step 3: Cross multiply
    13,385.70x = 18,471.77 × 7,720.69
  4. Step 4: Simplify right side
    13,385.70x = 142,614,809.92
  5. Step 5: Solve for x
    x = 142,614,809.92/13,385.70
  6. Step 6: Final answer
    x = 10,654.27

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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.