Home / 20,557.76-28,369.88-11,126.52

Finding the Fourth Proportional to 20,557.76, 28,369.88 and 11,126.52

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Solution

The fourth proportional to 20,557.76, 28,369.88 and 11,126.52 is: 15,354.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.76 : 28,369.88 = 11,126.52 : x
  2. Step 2: Convert to fraction form
    20,557.76/28,369.88 = 11,126.52/x
  3. Step 3: Cross multiply
    20,557.76x = 28,369.88 × 11,126.52
  4. Step 4: Simplify right side
    20,557.76x = 315,658,037.22
  5. Step 5: Solve for x
    x = 315,658,037.22/20,557.76
  6. Step 6: Final answer
    x = 15,354.69

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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.