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Finding the Fourth Proportional to 42,708.39, 64,101.96 and 21,663.20

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Solution

The fourth proportional to 42,708.39, 64,101.96 and 21,663.20 is: 32,514.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,708.39 : 64,101.96 = 21,663.20 : x
  2. Step 2: Convert to fraction form
    42,708.39/64,101.96 = 21,663.20/x
  3. Step 3: Cross multiply
    42,708.39x = 64,101.96 × 21,663.20
  4. Step 4: Simplify right side
    42,708.39x = 1,388,653,259.36
  5. Step 5: Solve for x
    x = 1,388,653,259.36/42,708.39
  6. Step 6: Final answer
    x = 32,514.76

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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.