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Finding the Fourth Proportional to 14,005.89, 20,986.16 and 8,802.45

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Solution

The fourth proportional to 14,005.89, 20,986.16 and 8,802.45 is: 13,189.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.89 : 20,986.16 = 8,802.45 : x
  2. Step 2: Convert to fraction form
    14,005.89/20,986.16 = 8,802.45/x
  3. Step 3: Cross multiply
    14,005.89x = 20,986.16 × 8,802.45
  4. Step 4: Simplify right side
    14,005.89x = 184,729,580.08
  5. Step 5: Solve for x
    x = 184,729,580.08/14,005.89
  6. Step 6: Final answer
    x = 13,189.42

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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.