Home / 20,960.69-28,925.88-11,400.71

Finding the Fourth Proportional to 20,960.69, 28,925.88 and 11,400.71

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Solution

The fourth proportional to 20,960.69, 28,925.88 and 11,400.71 is: 15,733.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.69 : 28,925.88 = 11,400.71 : x
  2. Step 2: Convert to fraction form
    20,960.69/28,925.88 = 11,400.71/x
  3. Step 3: Cross multiply
    20,960.69x = 28,925.88 × 11,400.71
  4. Step 4: Simplify right side
    20,960.69x = 329,775,424.75
  5. Step 5: Solve for x
    x = 329,775,424.75/20,960.69
  6. Step 6: Final answer
    x = 15,733.05

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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.