Home / 30,121.80-45,188.10-12,593.40

Finding the Fourth Proportional to 30,121.80, 45,188.10 and 12,593.40

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Solution

The fourth proportional to 30,121.80, 45,188.10 and 12,593.40 is: 18,892.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.80 : 45,188.10 = 12,593.40 : x
  2. Step 2: Convert to fraction form
    30,121.80/45,188.10 = 12,593.40/x
  3. Step 3: Cross multiply
    30,121.80x = 45,188.10 × 12,593.40
  4. Step 4: Simplify right side
    30,121.80x = 569,071,818.54
  5. Step 5: Solve for x
    x = 569,071,818.54/30,121.80
  6. Step 6: Final answer
    x = 18,892.36

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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.