Home / 30,161.39-45,242.10-20,664.34

Finding the Fourth Proportional to 30,161.39, 45,242.10 and 20,664.34

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Solution

The fourth proportional to 30,161.39, 45,242.10 and 20,664.34 is: 30,996.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,161.39 : 45,242.10 = 20,664.34 : x
  2. Step 2: Convert to fraction form
    30,161.39/45,242.10 = 20,664.34/x
  3. Step 3: Cross multiply
    30,161.39x = 45,242.10 × 20,664.34
  4. Step 4: Simplify right side
    30,161.39x = 934,898,023.61
  5. Step 5: Solve for x
    x = 934,898,023.61/30,161.39
  6. Step 6: Final answer
    x = 30,996.52

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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.