Home / 13,318.47-19,983.60-6,991.86

Finding the Fourth Proportional to 13,318.47, 19,983.60 and 6,991.86

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Solution

The fourth proportional to 13,318.47, 19,983.60 and 6,991.86 is: 10,490.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.47 : 19,983.60 = 6,991.86 : x
  2. Step 2: Convert to fraction form
    13,318.47/19,983.60 = 6,991.86/x
  3. Step 3: Cross multiply
    13,318.47x = 19,983.60 × 6,991.86
  4. Step 4: Simplify right side
    13,318.47x = 139,722,533.50
  5. Step 5: Solve for x
    x = 139,722,533.50/13,318.47
  6. Step 6: Final answer
    x = 10,490.88

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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.