Home / 20,684.28-28,543.91-11,485.52

Finding the Fourth Proportional to 20,684.28, 28,543.91 and 11,485.52

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Solution

The fourth proportional to 20,684.28, 28,543.91 and 11,485.52 is: 15,849.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.28 : 28,543.91 = 11,485.52 : x
  2. Step 2: Convert to fraction form
    20,684.28/28,543.91 = 11,485.52/x
  3. Step 3: Cross multiply
    20,684.28x = 28,543.91 × 11,485.52
  4. Step 4: Simplify right side
    20,684.28x = 327,841,649.18
  5. Step 5: Solve for x
    x = 327,841,649.18/20,684.28
  6. Step 6: Final answer
    x = 15,849.80

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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.