Home / 20,715.12-28,585.98-11,283.72

Finding the Fourth Proportional to 20,715.12, 28,585.98 and 11,283.72

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Solution

The fourth proportional to 20,715.12, 28,585.98 and 11,283.72 is: 15,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.12 : 28,585.98 = 11,283.72 : x
  2. Step 2: Convert to fraction form
    20,715.12/28,585.98 = 11,283.72/x
  3. Step 3: Cross multiply
    20,715.12x = 28,585.98 × 11,283.72
  4. Step 4: Simplify right side
    20,715.12x = 322,556,194.25
  5. Step 5: Solve for x
    x = 322,556,194.25/20,715.12
  6. Step 6: Final answer
    x = 15,571.05

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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.