Home / 20,985.24-28,959.69-11,425.23

Finding the Fourth Proportional to 20,985.24, 28,959.69 and 11,425.23

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Solution

The fourth proportional to 20,985.24, 28,959.69 and 11,425.23 is: 15,766.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.24 : 28,959.69 = 11,425.23 : x
  2. Step 2: Convert to fraction form
    20,985.24/28,959.69 = 11,425.23/x
  3. Step 3: Cross multiply
    20,985.24x = 28,959.69 × 11,425.23
  4. Step 4: Simplify right side
    20,985.24x = 330,871,118.98
  5. Step 5: Solve for x
    x = 330,871,118.98/20,985.24
  6. Step 6: Final answer
    x = 15,766.85

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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.