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Finding the Fourth Proportional to 20,959.78, 28,900.29 and 16,707.54

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Solution

The fourth proportional to 20,959.78, 28,900.29 and 16,707.54 is: 23,037.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.78 : 28,900.29 = 16,707.54 : x
  2. Step 2: Convert to fraction form
    20,959.78/28,900.29 = 16,707.54/x
  3. Step 3: Cross multiply
    20,959.78x = 28,900.29 × 16,707.54
  4. Step 4: Simplify right side
    20,959.78x = 482,852,840.93
  5. Step 5: Solve for x
    x = 482,852,840.93/20,959.78
  6. Step 6: Final answer
    x = 23,037.12

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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.