Home / 28,666.54-39,555.84-15,918.76

Finding the Fourth Proportional to 28,666.54, 39,555.84 and 15,918.76

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Solution

The fourth proportional to 28,666.54, 39,555.84 and 15,918.76 is: 21,965.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.54 : 39,555.84 = 15,918.76 : x
  2. Step 2: Convert to fraction form
    28,666.54/39,555.84 = 15,918.76/x
  3. Step 3: Cross multiply
    28,666.54x = 39,555.84 × 15,918.76
  4. Step 4: Simplify right side
    28,666.54x = 629,679,923.56
  5. Step 5: Solve for x
    x = 629,679,923.56/28,666.54
  6. Step 6: Final answer
    x = 21,965.68

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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.