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Finding the Fourth Proportional to 18,390.66, 25,384.32 and 10,841.38

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Solution

The fourth proportional to 18,390.66, 25,384.32 and 10,841.38 is: 14,964.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.66 : 25,384.32 = 10,841.38 : x
  2. Step 2: Convert to fraction form
    18,390.66/25,384.32 = 10,841.38/x
  3. Step 3: Cross multiply
    18,390.66x = 25,384.32 × 10,841.38
  4. Step 4: Simplify right side
    18,390.66x = 275,201,059.16
  5. Step 5: Solve for x
    x = 275,201,059.16/18,390.66
  6. Step 6: Final answer
    x = 14,964.18

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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.