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Finding the Fourth Proportional to 18,480.76, 25,504.50 and 11,407.30

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Solution

The fourth proportional to 18,480.76, 25,504.50 and 11,407.30 is: 15,742.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.76 : 25,504.50 = 11,407.30 : x
  2. Step 2: Convert to fraction form
    18,480.76/25,504.50 = 11,407.30/x
  3. Step 3: Cross multiply
    18,480.76x = 25,504.50 × 11,407.30
  4. Step 4: Simplify right side
    18,480.76x = 290,937,461.87
  5. Step 5: Solve for x
    x = 290,937,461.87/18,480.76
  6. Step 6: Final answer
    x = 15,742.72

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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.