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Finding the Fourth Proportional to 18,391.21, 27,587.08 and 8,898.01

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Solution

The fourth proportional to 18,391.21, 27,587.08 and 8,898.01 is: 13,347.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.21 : 27,587.08 = 8,898.01 : x
  2. Step 2: Convert to fraction form
    18,391.21/27,587.08 = 8,898.01/x
  3. Step 3: Cross multiply
    18,391.21x = 27,587.08 × 8,898.01
  4. Step 4: Simplify right side
    18,391.21x = 245,470,113.71
  5. Step 5: Solve for x
    x = 245,470,113.71/18,391.21
  6. Step 6: Final answer
    x = 13,347.14

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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.