Home / 15,739.38-21,720.96-8,666.46

Finding the Fourth Proportional to 15,739.38, 21,720.96 and 8,666.46

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Solution

The fourth proportional to 15,739.38, 21,720.96 and 8,666.46 is: 11,960.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.38 : 21,720.96 = 8,666.46 : x
  2. Step 2: Convert to fraction form
    15,739.38/21,720.96 = 8,666.46/x
  3. Step 3: Cross multiply
    15,739.38x = 21,720.96 × 8,666.46
  4. Step 4: Simplify right side
    15,739.38x = 188,243,831.00
  5. Step 5: Solve for x
    x = 188,243,831.00/15,739.38
  6. Step 6: Final answer
    x = 11,960.05

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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.