Home / 42,786.60-64,136.70-19,429.80

Finding the Fourth Proportional to 42,786.60, 64,136.70 and 19,429.80

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Solution

The fourth proportional to 42,786.60, 64,136.70 and 19,429.80 is: 29,125.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,786.60 : 64,136.70 = 19,429.80 : x
  2. Step 2: Convert to fraction form
    42,786.60/64,136.70 = 19,429.80/x
  3. Step 3: Cross multiply
    42,786.60x = 64,136.70 × 19,429.80
  4. Step 4: Simplify right side
    42,786.60x = 1,246,163,253.66
  5. Step 5: Solve for x
    x = 1,246,163,253.66/42,786.60
  6. Step 6: Final answer
    x = 29,125.08

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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.