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Finding the Fourth Proportional to 14,607.78, 21,921.40 and 5,373.78

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Solution

The fourth proportional to 14,607.78, 21,921.40 and 5,373.78 is: 8,064.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,607.78 : 21,921.40 = 5,373.78 : x
  2. Step 2: Convert to fraction form
    14,607.78/21,921.40 = 5,373.78/x
  3. Step 3: Cross multiply
    14,607.78x = 21,921.40 × 5,373.78
  4. Step 4: Simplify right side
    14,607.78x = 117,800,780.89
  5. Step 5: Solve for x
    x = 117,800,780.89/14,607.78
  6. Step 6: Final answer
    x = 8,064.25

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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.