Home / 13,489.34-18,615.69-7,520.85

Finding the Fourth Proportional to 13,489.34, 18,615.69 and 7,520.85

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Solution

The fourth proportional to 13,489.34, 18,615.69 and 7,520.85 is: 10,379.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.34 : 18,615.69 = 7,520.85 : x
  2. Step 2: Convert to fraction form
    13,489.34/18,615.69 = 7,520.85/x
  3. Step 3: Cross multiply
    13,489.34x = 18,615.69 × 7,520.85
  4. Step 4: Simplify right side
    13,489.34x = 140,005,812.14
  5. Step 5: Solve for x
    x = 140,005,812.14/13,489.34
  6. Step 6: Final answer
    x = 10,379.00

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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.