Home / 20,715.94-28,587.45-11,283.94

Finding the Fourth Proportional to 20,715.94, 28,587.45 and 11,283.94

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Solution

The fourth proportional to 20,715.94, 28,587.45 and 11,283.94 is: 15,571.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.94 : 28,587.45 = 11,283.94 : x
  2. Step 2: Convert to fraction form
    20,715.94/28,587.45 = 11,283.94/x
  3. Step 3: Cross multiply
    20,715.94x = 28,587.45 × 11,283.94
  4. Step 4: Simplify right side
    20,715.94x = 322,579,070.55
  5. Step 5: Solve for x
    x = 322,579,070.55/20,715.94
  6. Step 6: Final answer
    x = 15,571.54

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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.