Home / 15,740.15-21,720.89-8,666.56

Finding the Fourth Proportional to 15,740.15, 21,720.89 and 8,666.56

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Solution

The fourth proportional to 15,740.15, 21,720.89 and 8,666.56 is: 11,959.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.15 : 21,720.89 = 8,666.56 : x
  2. Step 2: Convert to fraction form
    15,740.15/21,720.89 = 8,666.56/x
  3. Step 3: Cross multiply
    15,740.15x = 21,720.89 × 8,666.56
  4. Step 4: Simplify right side
    15,740.15x = 188,245,244.50
  5. Step 5: Solve for x
    x = 188,245,244.50/15,740.15
  6. Step 6: Final answer
    x = 11,959.56

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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.