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Finding the Fourth Proportional to 11,458.89, 15,813.27 and 6,490.89

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Solution

The fourth proportional to 11,458.89, 15,813.27 and 6,490.89 is: 8,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,458.89 : 15,813.27 = 6,490.89 : x
  2. Step 2: Convert to fraction form
    11,458.89/15,813.27 = 6,490.89/x
  3. Step 3: Cross multiply
    11,458.89x = 15,813.27 × 6,490.89
  4. Step 4: Simplify right side
    11,458.89x = 102,642,196.11
  5. Step 5: Solve for x
    x = 102,642,196.11/11,458.89
  6. Step 6: Final answer
    x = 8,957.43

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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.