Home / 21,985.68-30,338.76-13,600.56

Finding the Fourth Proportional to 21,985.68, 30,338.76 and 13,600.56

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Solution

The fourth proportional to 21,985.68, 30,338.76 and 13,600.56 is: 18,767.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.68 : 30,338.76 = 13,600.56 : x
  2. Step 2: Convert to fraction form
    21,985.68/30,338.76 = 13,600.56/x
  3. Step 3: Cross multiply
    21,985.68x = 30,338.76 × 13,600.56
  4. Step 4: Simplify right side
    21,985.68x = 412,624,125.71
  5. Step 5: Solve for x
    x = 412,624,125.71/21,985.68
  6. Step 6: Final answer
    x = 18,767.86

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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.