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Finding the Fourth Proportional to 14,388.18, 19,860.03 and 8,421.18

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Solution

The fourth proportional to 14,388.18, 19,860.03 and 8,421.18 is: 11,623.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,388.18 : 19,860.03 = 8,421.18 : x
  2. Step 2: Convert to fraction form
    14,388.18/19,860.03 = 8,421.18/x
  3. Step 3: Cross multiply
    14,388.18x = 19,860.03 × 8,421.18
  4. Step 4: Simplify right side
    14,388.18x = 167,244,887.44
  5. Step 5: Solve for x
    x = 167,244,887.44/14,388.18
  6. Step 6: Final answer
    x = 11,623.77

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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.