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Finding the Fourth Proportional to 14,280.71, 21,415.77 and 4,918.14

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Solution

The fourth proportional to 14,280.71, 21,415.77 and 4,918.14 is: 7,375.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,280.71 : 21,415.77 = 4,918.14 : x
  2. Step 2: Convert to fraction form
    14,280.71/21,415.77 = 4,918.14/x
  3. Step 3: Cross multiply
    14,280.71x = 21,415.77 × 4,918.14
  4. Step 4: Simplify right side
    14,280.71x = 105,325,755.07
  5. Step 5: Solve for x
    x = 105,325,755.07/14,280.71
  6. Step 6: Final answer
    x = 7,375.39

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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.