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Finding the Fourth Proportional to 20,293.68, 28,005 and 11,341.32

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Solution

The fourth proportional to 20,293.68, 28,005 and 11,341.32 is: 15,650.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,293.68 : 28,005 = 11,341.32 : x
  2. Step 2: Convert to fraction form
    20,293.68/28,005 = 11,341.32/x
  3. Step 3: Cross multiply
    20,293.68x = 28,005 × 11,341.32
  4. Step 4: Simplify right side
    20,293.68x = 317,613,666.60
  5. Step 5: Solve for x
    x = 317,613,666.60/20,293.68
  6. Step 6: Final answer
    x = 15,650.87

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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.