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Finding the Fourth Proportional to 18,521.84, 25,555.72 and 10,965.76

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Solution

The fourth proportional to 18,521.84, 25,555.72 and 10,965.76 is: 15,130.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.84 : 25,555.72 = 10,965.76 : x
  2. Step 2: Convert to fraction form
    18,521.84/25,555.72 = 10,965.76/x
  3. Step 3: Cross multiply
    18,521.84x = 25,555.72 × 10,965.76
  4. Step 4: Simplify right side
    18,521.84x = 280,237,892.15
  5. Step 5: Solve for x
    x = 280,237,892.15/18,521.84
  6. Step 6: Final answer
    x = 15,130.13

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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.