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Finding the Fourth Proportional to 18,095.40, 27,143.10 and 13,721.40

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Solution

The fourth proportional to 18,095.40, 27,143.10 and 13,721.40 is: 20,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,095.40 : 27,143.10 = 13,721.40 : x
  2. Step 2: Convert to fraction form
    18,095.40/27,143.10 = 13,721.40/x
  3. Step 3: Cross multiply
    18,095.40x = 27,143.10 × 13,721.40
  4. Step 4: Simplify right side
    18,095.40x = 372,441,332.34
  5. Step 5: Solve for x
    x = 372,441,332.34/18,095.40
  6. Step 6: Final answer
    x = 20,582.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.