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Finding the Fourth Proportional to 28,929.68, 39,924.68 and 16,355.60

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Solution

The fourth proportional to 28,929.68, 39,924.68 and 16,355.60 is: 22,571.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,929.68 : 39,924.68 = 16,355.60 : x
  2. Step 2: Convert to fraction form
    28,929.68/39,924.68 = 16,355.60/x
  3. Step 3: Cross multiply
    28,929.68x = 39,924.68 × 16,355.60
  4. Step 4: Simplify right side
    28,929.68x = 652,992,096.21
  5. Step 5: Solve for x
    x = 652,992,096.21/28,929.68
  6. Step 6: Final answer
    x = 22,571.70

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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.