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Finding the Fourth Proportional to 18,798.45, 25,931.01 and 11,712.57

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Solution

The fourth proportional to 18,798.45, 25,931.01 and 11,712.57 is: 16,156.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.45 : 25,931.01 = 11,712.57 : x
  2. Step 2: Convert to fraction form
    18,798.45/25,931.01 = 11,712.57/x
  3. Step 3: Cross multiply
    18,798.45x = 25,931.01 × 11,712.57
  4. Step 4: Simplify right side
    18,798.45x = 303,718,769.80
  5. Step 5: Solve for x
    x = 303,718,769.80/18,798.45
  6. Step 6: Final answer
    x = 16,156.59

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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.