Home / 14,259.60-21,399-6,469.20

Finding the Fourth Proportional to 14,259.60, 21,399 and 6,469.20

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Solution

The fourth proportional to 14,259.60, 21,399 and 6,469.20 is: 9,708.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,259.60 : 21,399 = 6,469.20 : x
  2. Step 2: Convert to fraction form
    14,259.60/21,399 = 6,469.20/x
  3. Step 3: Cross multiply
    14,259.60x = 21,399 × 6,469.20
  4. Step 4: Simplify right side
    14,259.60x = 138,434,410.80
  5. Step 5: Solve for x
    x = 138,434,410.80/14,259.60
  6. Step 6: Final answer
    x = 9,708.16

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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.