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Finding the Fourth Proportional to 18,543.76, 25,570.02 and 11,821.84

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Solution

The fourth proportional to 18,543.76, 25,570.02 and 11,821.84 is: 16,301.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,543.76 : 25,570.02 = 11,821.84 : x
  2. Step 2: Convert to fraction form
    18,543.76/25,570.02 = 11,821.84/x
  3. Step 3: Cross multiply
    18,543.76x = 25,570.02 × 11,821.84
  4. Step 4: Simplify right side
    18,543.76x = 302,284,685.24
  5. Step 5: Solve for x
    x = 302,284,685.24/18,543.76
  6. Step 6: Final answer
    x = 16,301.15

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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.