Home / 20,916.85-28,865.47-11,356.82

Finding the Fourth Proportional to 20,916.85, 28,865.47 and 11,356.82

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Solution

The fourth proportional to 20,916.85, 28,865.47 and 11,356.82 is: 15,672.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.85 : 28,865.47 = 11,356.82 : x
  2. Step 2: Convert to fraction form
    20,916.85/28,865.47 = 11,356.82/x
  3. Step 3: Cross multiply
    20,916.85x = 28,865.47 × 11,356.82
  4. Step 4: Simplify right side
    20,916.85x = 327,819,947.01
  5. Step 5: Solve for x
    x = 327,819,947.01/20,916.85
  6. Step 6: Final answer
    x = 15,672.53

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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.