Home / 21,699.12-29,935.92-14,142.68

Finding the Fourth Proportional to 21,699.12, 29,935.92 and 14,142.68

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Solution

The fourth proportional to 21,699.12, 29,935.92 and 14,142.68 is: 19,511.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.12 : 29,935.92 = 14,142.68 : x
  2. Step 2: Convert to fraction form
    21,699.12/29,935.92 = 14,142.68/x
  3. Step 3: Cross multiply
    21,699.12x = 29,935.92 × 14,142.68
  4. Step 4: Simplify right side
    21,699.12x = 423,374,137.07
  5. Step 5: Solve for x
    x = 423,374,137.07/21,699.12
  6. Step 6: Final answer
    x = 19,511.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.