Home / 21,685.49-29,909.46-18,665.75

Finding the Fourth Proportional to 21,685.49, 29,909.46 and 18,665.75

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Solution

The fourth proportional to 21,685.49, 29,909.46 and 18,665.75 is: 25,744.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.49 : 29,909.46 = 18,665.75 : x
  2. Step 2: Convert to fraction form
    21,685.49/29,909.46 = 18,665.75/x
  3. Step 3: Cross multiply
    21,685.49x = 29,909.46 × 18,665.75
  4. Step 4: Simplify right side
    21,685.49x = 558,282,353.45
  5. Step 5: Solve for x
    x = 558,282,353.45/21,685.49
  6. Step 6: Final answer
    x = 25,744.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.