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Finding the Fourth Proportional to 18,509.76, 27,776.94 and 8,649.81

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Solution

The fourth proportional to 18,509.76, 27,776.94 and 8,649.81 is: 12,980.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.76 : 27,776.94 = 8,649.81 : x
  2. Step 2: Convert to fraction form
    18,509.76/27,776.94 = 8,649.81/x
  3. Step 3: Cross multiply
    18,509.76x = 27,776.94 × 8,649.81
  4. Step 4: Simplify right side
    18,509.76x = 240,265,253.38
  5. Step 5: Solve for x
    x = 240,265,253.38/18,509.76
  6. Step 6: Final answer
    x = 12,980.46

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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.