Home / 20,916.54-28,864.86-11,485.70

Finding the Fourth Proportional to 20,916.54, 28,864.86 and 11,485.70

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Solution

The fourth proportional to 20,916.54, 28,864.86 and 11,485.70 is: 15,850.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.54 : 28,864.86 = 11,485.70 : x
  2. Step 2: Convert to fraction form
    20,916.54/28,864.86 = 11,485.70/x
  3. Step 3: Cross multiply
    20,916.54x = 28,864.86 × 11,485.70
  4. Step 4: Simplify right side
    20,916.54x = 331,533,122.50
  5. Step 5: Solve for x
    x = 331,533,122.50/20,916.54
  6. Step 6: Final answer
    x = 15,850.29

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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.