Home / 15,739.48-21,720.60-8,666.14

Finding the Fourth Proportional to 15,739.48, 21,720.60 and 8,666.14

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Solution

The fourth proportional to 15,739.48, 21,720.60 and 8,666.14 is: 11,959.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.48 : 21,720.60 = 8,666.14 : x
  2. Step 2: Convert to fraction form
    15,739.48/21,720.60 = 8,666.14/x
  3. Step 3: Cross multiply
    15,739.48x = 21,720.60 × 8,666.14
  4. Step 4: Simplify right side
    15,739.48x = 188,233,760.48
  5. Step 5: Solve for x
    x = 188,233,760.48/15,739.48
  6. Step 6: Final answer
    x = 11,959.34

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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.