Home / 28,931.78-43,399.20-9,211.88

Finding the Fourth Proportional to 28,931.78, 43,399.20 and 9,211.88

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Solution

The fourth proportional to 28,931.78, 43,399.20 and 9,211.88 is: 13,818.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,931.78 : 43,399.20 = 9,211.88 : x
  2. Step 2: Convert to fraction form
    28,931.78/43,399.20 = 9,211.88/x
  3. Step 3: Cross multiply
    28,931.78x = 43,399.20 × 9,211.88
  4. Step 4: Simplify right side
    28,931.78x = 399,788,222.50
  5. Step 5: Solve for x
    x = 399,788,222.50/28,931.78
  6. Step 6: Final answer
    x = 13,818.31

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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.