Home / 15,739.98-21,721.29-8,666.64

Finding the Fourth Proportional to 15,739.98, 21,721.29 and 8,666.64

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Solution

The fourth proportional to 15,739.98, 21,721.29 and 8,666.64 is: 11,960.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.98 : 21,721.29 = 8,666.64 : x
  2. Step 2: Convert to fraction form
    15,739.98/21,721.29 = 8,666.64/x
  3. Step 3: Cross multiply
    15,739.98x = 21,721.29 × 8,666.64
  4. Step 4: Simplify right side
    15,739.98x = 188,250,600.77
  5. Step 5: Solve for x
    x = 188,250,600.77/15,739.98
  6. Step 6: Final answer
    x = 11,960.03

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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.