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Finding the Fourth Proportional to 18,776.30, 25,903.03 and 11,218.84

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Solution

The fourth proportional to 18,776.30, 25,903.03 and 11,218.84 is: 15,477.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.30 : 25,903.03 = 11,218.84 : x
  2. Step 2: Convert to fraction form
    18,776.30/25,903.03 = 11,218.84/x
  3. Step 3: Cross multiply
    18,776.30x = 25,903.03 × 11,218.84
  4. Step 4: Simplify right side
    18,776.30x = 290,602,054.57
  5. Step 5: Solve for x
    x = 290,602,054.57/18,776.30
  6. Step 6: Final answer
    x = 15,477.07

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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.