Home / 13,687.17-20,518.20-8,999.70

Finding the Fourth Proportional to 13,687.17, 20,518.20 and 8,999.70

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Solution

The fourth proportional to 13,687.17, 20,518.20 and 8,999.70 is: 13,491.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.17 : 20,518.20 = 8,999.70 : x
  2. Step 2: Convert to fraction form
    13,687.17/20,518.20 = 8,999.70/x
  3. Step 3: Cross multiply
    13,687.17x = 20,518.20 × 8,999.70
  4. Step 4: Simplify right side
    13,687.17x = 184,657,644.54
  5. Step 5: Solve for x
    x = 184,657,644.54/13,687.17
  6. Step 6: Final answer
    x = 13,491.29

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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.