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Finding the Fourth Proportional to 18,453.76, 27,688.77 and 9,686.66

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Solution

The fourth proportional to 18,453.76, 27,688.77 and 9,686.66 is: 14,534.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,453.76 : 27,688.77 = 9,686.66 : x
  2. Step 2: Convert to fraction form
    18,453.76/27,688.77 = 9,686.66/x
  3. Step 3: Cross multiply
    18,453.76x = 27,688.77 × 9,686.66
  4. Step 4: Simplify right side
    18,453.76x = 268,211,562.36
  5. Step 5: Solve for x
    x = 268,211,562.36/18,453.76
  6. Step 6: Final answer
    x = 14,534.25

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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.