Home / 30,664.78-45,905.50-18,781.14

Finding the Fourth Proportional to 30,664.78, 45,905.50 and 18,781.14

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Solution

The fourth proportional to 30,664.78, 45,905.50 and 18,781.14 is: 28,115.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,664.78 : 45,905.50 = 18,781.14 : x
  2. Step 2: Convert to fraction form
    30,664.78/45,905.50 = 18,781.14/x
  3. Step 3: Cross multiply
    30,664.78x = 45,905.50 × 18,781.14
  4. Step 4: Simplify right side
    30,664.78x = 862,157,622.27
  5. Step 5: Solve for x
    x = 862,157,622.27/30,664.78
  6. Step 6: Final answer
    x = 28,115.57

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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.