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Finding the Fourth Proportional to 14,337.80, 21,509.78 and 4,978.12

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Solution

The fourth proportional to 14,337.80, 21,509.78 and 4,978.12 is: 7,468.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,337.80 : 21,509.78 = 4,978.12 : x
  2. Step 2: Convert to fraction form
    14,337.80/21,509.78 = 4,978.12/x
  3. Step 3: Cross multiply
    14,337.80x = 21,509.78 × 4,978.12
  4. Step 4: Simplify right side
    14,337.80x = 107,078,266.01
  5. Step 5: Solve for x
    x = 107,078,266.01/14,337.80
  6. Step 6: Final answer
    x = 7,468.25

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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.