Home / 42,909.75-64,369.08-11,745

Finding the Fourth Proportional to 42,909.75, 64,369.08 and 11,745

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Solution

The fourth proportional to 42,909.75, 64,369.08 and 11,745 is: 17,618.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,909.75 : 64,369.08 = 11,745 : x
  2. Step 2: Convert to fraction form
    42,909.75/64,369.08 = 11,745/x
  3. Step 3: Cross multiply
    42,909.75x = 64,369.08 × 11,745
  4. Step 4: Simplify right side
    42,909.75x = 756,014,844.60
  5. Step 5: Solve for x
    x = 756,014,844.60/42,909.75
  6. Step 6: Final answer
    x = 17,618.72

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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.