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Finding the Fourth Proportional to 30,678.63, 45,980.28 and 15,879.12

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Solution

The fourth proportional to 30,678.63, 45,980.28 and 15,879.12 is: 23,799.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,678.63 : 45,980.28 = 15,879.12 : x
  2. Step 2: Convert to fraction form
    30,678.63/45,980.28 = 15,879.12/x
  3. Step 3: Cross multiply
    30,678.63x = 45,980.28 × 15,879.12
  4. Step 4: Simplify right side
    30,678.63x = 730,126,383.75
  5. Step 5: Solve for x
    x = 730,126,383.75/30,678.63
  6. Step 6: Final answer
    x = 23,799.18

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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.