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Finding the Fourth Proportional to 42,668.94, 64,001.01 and 13,086.69

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Solution

The fourth proportional to 42,668.94, 64,001.01 and 13,086.69 is: 19,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,668.94 : 64,001.01 = 13,086.69 : x
  2. Step 2: Convert to fraction form
    42,668.94/64,001.01 = 13,086.69/x
  3. Step 3: Cross multiply
    42,668.94x = 64,001.01 × 13,086.69
  4. Step 4: Simplify right side
    42,668.94x = 837,561,377.56
  5. Step 5: Solve for x
    x = 837,561,377.56/42,668.94
  6. Step 6: Final answer
    x = 19,629.30

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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.