Home / 28,555.34-39,406.10-15,980.09

Finding the Fourth Proportional to 28,555.34, 39,406.10 and 15,980.09

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Solution

The fourth proportional to 28,555.34, 39,406.10 and 15,980.09 is: 22,052.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.34 : 39,406.10 = 15,980.09 : x
  2. Step 2: Convert to fraction form
    28,555.34/39,406.10 = 15,980.09/x
  3. Step 3: Cross multiply
    28,555.34x = 39,406.10 × 15,980.09
  4. Step 4: Simplify right side
    28,555.34x = 629,712,747.62
  5. Step 5: Solve for x
    x = 629,712,747.62/28,555.34
  6. Step 6: Final answer
    x = 22,052.37

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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.