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Finding the Fourth Proportional to 28,375.01, 39,165.68 and 18,970.91

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Solution

The fourth proportional to 28,375.01, 39,165.68 and 18,970.91 is: 26,185.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.01 : 39,165.68 = 18,970.91 : x
  2. Step 2: Convert to fraction form
    28,375.01/39,165.68 = 18,970.91/x
  3. Step 3: Cross multiply
    28,375.01x = 39,165.68 × 18,970.91
  4. Step 4: Simplify right side
    28,375.01x = 743,008,482.13
  5. Step 5: Solve for x
    x = 743,008,482.13/28,375.01
  6. Step 6: Final answer
    x = 26,185.31

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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.