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Finding the Fourth Proportional to 17,719.20, 26,521.20 and 13,802.40

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Solution

The fourth proportional to 17,719.20, 26,521.20 and 13,802.40 is: 20,658.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,719.20 : 26,521.20 = 13,802.40 : x
  2. Step 2: Convert to fraction form
    17,719.20/26,521.20 = 13,802.40/x
  3. Step 3: Cross multiply
    17,719.20x = 26,521.20 × 13,802.40
  4. Step 4: Simplify right side
    17,719.20x = 366,056,210.88
  5. Step 5: Solve for x
    x = 366,056,210.88/17,719.20
  6. Step 6: Final answer
    x = 20,658.73

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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.