Home / 20,836.47-28,754.53-11,405.24

Finding the Fourth Proportional to 20,836.47, 28,754.53 and 11,405.24

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Solution

The fourth proportional to 20,836.47, 28,754.53 and 11,405.24 is: 15,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.47 : 28,754.53 = 11,405.24 : x
  2. Step 2: Convert to fraction form
    20,836.47/28,754.53 = 11,405.24/x
  3. Step 3: Cross multiply
    20,836.47x = 28,754.53 × 11,405.24
  4. Step 4: Simplify right side
    20,836.47x = 327,952,315.74
  5. Step 5: Solve for x
    x = 327,952,315.74/20,836.47
  6. Step 6: Final answer
    x = 15,739.34

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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.