Home / 20,715.29-28,586.95-11,283.85

Finding the Fourth Proportional to 20,715.29, 28,586.95 and 11,283.85

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Solution

The fourth proportional to 20,715.29, 28,586.95 and 11,283.85 is: 15,571.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.29 : 28,586.95 = 11,283.85 : x
  2. Step 2: Convert to fraction form
    20,715.29/28,586.95 = 11,283.85/x
  3. Step 3: Cross multiply
    20,715.29x = 28,586.95 × 11,283.85
  4. Step 4: Simplify right side
    20,715.29x = 322,570,756.08
  5. Step 5: Solve for x
    x = 322,570,756.08/20,715.29
  6. Step 6: Final answer
    x = 15,571.63

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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.