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Finding the Fourth Proportional to 28,014.60, 42,021.90 and 7,238.10

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Solution

The fourth proportional to 28,014.60, 42,021.90 and 7,238.10 is: 10,857.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,014.60 : 42,021.90 = 7,238.10 : x
  2. Step 2: Convert to fraction form
    28,014.60/42,021.90 = 7,238.10/x
  3. Step 3: Cross multiply
    28,014.60x = 42,021.90 × 7,238.10
  4. Step 4: Simplify right side
    28,014.60x = 304,158,714.39
  5. Step 5: Solve for x
    x = 304,158,714.39/28,014.60
  6. Step 6: Final answer
    x = 10,857.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.