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Finding the Fourth Proportional to 18,752.77, 25,890.05 and 11,688.76

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Solution

The fourth proportional to 18,752.77, 25,890.05 and 11,688.76 is: 16,137.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.77 : 25,890.05 = 11,688.76 : x
  2. Step 2: Convert to fraction form
    18,752.77/25,890.05 = 11,688.76/x
  3. Step 3: Cross multiply
    18,752.77x = 25,890.05 × 11,688.76
  4. Step 4: Simplify right side
    18,752.77x = 302,622,392.94
  5. Step 5: Solve for x
    x = 302,622,392.94/18,752.77
  6. Step 6: Final answer
    x = 16,137.48

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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.