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Finding the Fourth Proportional to 18,458.77, 27,688.55 and 5,978.77

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Solution

The fourth proportional to 18,458.77, 27,688.55 and 5,978.77 is: 8,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.77 : 27,688.55 = 5,978.77 : x
  2. Step 2: Convert to fraction form
    18,458.77/27,688.55 = 5,978.77/x
  3. Step 3: Cross multiply
    18,458.77x = 27,688.55 × 5,978.77
  4. Step 4: Simplify right side
    18,458.77x = 165,543,472.08
  5. Step 5: Solve for x
    x = 165,543,472.08/18,458.77
  6. Step 6: Final answer
    x = 8,968.28

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1.5x scale

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.