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Finding the Fourth Proportional to 14,294.40, 21,443.64 and 5,412.99

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Solution

The fourth proportional to 14,294.40, 21,443.64 and 5,412.99 is: 8,120.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,294.40 : 21,443.64 = 5,412.99 : x
  2. Step 2: Convert to fraction form
    14,294.40/21,443.64 = 5,412.99/x
  3. Step 3: Cross multiply
    14,294.40x = 21,443.64 × 5,412.99
  4. Step 4: Simplify right side
    14,294.40x = 116,074,208.88
  5. Step 5: Solve for x
    x = 116,074,208.88/14,294.40
  6. Step 6: Final answer
    x = 8,120.26

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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.