Home / 40,990.86-56,509.65-30,930.66

Finding the Fourth Proportional to 40,990.86, 56,509.65 and 30,930.66

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Solution

The fourth proportional to 40,990.86, 56,509.65 and 30,930.66 is: 42,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,990.86 : 56,509.65 = 30,930.66 : x
  2. Step 2: Convert to fraction form
    40,990.86/56,509.65 = 30,930.66/x
  3. Step 3: Cross multiply
    40,990.86x = 56,509.65 × 30,930.66
  4. Step 4: Simplify right side
    40,990.86x = 1,747,880,770.87
  5. Step 5: Solve for x
    x = 1,747,880,770.87/40,990.86
  6. Step 6: Final answer
    x = 42,640.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.