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Finding the Fourth Proportional to 28,785.78, 39,724.26 and 16,039.11

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Solution

The fourth proportional to 28,785.78, 39,724.26 and 16,039.11 is: 22,133.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,785.78 : 39,724.26 = 16,039.11 : x
  2. Step 2: Convert to fraction form
    28,785.78/39,724.26 = 16,039.11/x
  3. Step 3: Cross multiply
    28,785.78x = 39,724.26 × 16,039.11
  4. Step 4: Simplify right side
    28,785.78x = 637,141,775.81
  5. Step 5: Solve for x
    x = 637,141,775.81/28,785.78
  6. Step 6: Final answer
    x = 22,133.91

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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.