Home / 10,220.96-14,090.64-8,642.72

Finding the Fourth Proportional to 10,220.96, 14,090.64 and 8,642.72

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Solution

The fourth proportional to 10,220.96, 14,090.64 and 8,642.72 is: 11,914.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,220.96 : 14,090.64 = 8,642.72 : x
  2. Step 2: Convert to fraction form
    10,220.96/14,090.64 = 8,642.72/x
  3. Step 3: Cross multiply
    10,220.96x = 14,090.64 × 8,642.72
  4. Step 4: Simplify right side
    10,220.96x = 121,781,456.14
  5. Step 5: Solve for x
    x = 121,781,456.14/10,220.96
  6. Step 6: Final answer
    x = 11,914.87

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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.