Home / 31,425.86-43,325.24-21,336.78

Finding the Fourth Proportional to 31,425.86, 43,325.24 and 21,336.78

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Solution

The fourth proportional to 31,425.86, 43,325.24 and 21,336.78 is: 29,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,425.86 : 43,325.24 = 21,336.78 : x
  2. Step 2: Convert to fraction form
    31,425.86/43,325.24 = 21,336.78/x
  3. Step 3: Cross multiply
    31,425.86x = 43,325.24 × 21,336.78
  4. Step 4: Simplify right side
    31,425.86x = 924,421,007.64
  5. Step 5: Solve for x
    x = 924,421,007.64/31,425.86
  6. Step 6: Final answer
    x = 29,415.94

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1.5x scale

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.