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Finding the Fourth Proportional to 14,139.26, 21,208.90 and 4,905.26

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Solution

The fourth proportional to 14,139.26, 21,208.90 and 4,905.26 is: 7,357.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.26 : 21,208.90 = 4,905.26 : x
  2. Step 2: Convert to fraction form
    14,139.26/21,208.90 = 4,905.26/x
  3. Step 3: Cross multiply
    14,139.26x = 21,208.90 × 4,905.26
  4. Step 4: Simplify right side
    14,139.26x = 104,035,168.81
  5. Step 5: Solve for x
    x = 104,035,168.81/14,139.26
  6. Step 6: Final answer
    x = 7,357.89

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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.