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Finding the Fourth Proportional to 28,380, 39,164.04 and 15,633.84

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Solution

The fourth proportional to 28,380, 39,164.04 and 15,633.84 is: 21,574.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380 : 39,164.04 = 15,633.84 : x
  2. Step 2: Convert to fraction form
    28,380/39,164.04 = 15,633.84/x
  3. Step 3: Cross multiply
    28,380x = 39,164.04 × 15,633.84
  4. Step 4: Simplify right side
    28,380x = 612,284,335.11
  5. Step 5: Solve for x
    x = 612,284,335.11/28,380
  6. Step 6: Final answer
    x = 21,574.50

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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.