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Finding the Fourth Proportional to 42,906.99, 64,360.50 and 11,742.24

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Solution

The fourth proportional to 42,906.99, 64,360.50 and 11,742.24 is: 17,613.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,906.99 : 64,360.50 = 11,742.24 : x
  2. Step 2: Convert to fraction form
    42,906.99/64,360.50 = 11,742.24/x
  3. Step 3: Cross multiply
    42,906.99x = 64,360.50 × 11,742.24
  4. Step 4: Simplify right side
    42,906.99x = 755,736,378.81
  5. Step 5: Solve for x
    x = 755,736,378.81/42,906.99
  6. Step 6: Final answer
    x = 17,613.36

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Double scale
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Similar ratio
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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.