Home / 21,145.38-29,167.79-13,975.35

Finding the Fourth Proportional to 21,145.38, 29,167.79 and 13,975.35

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Solution

The fourth proportional to 21,145.38, 29,167.79 and 13,975.35 is: 19,277.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.38 : 29,167.79 = 13,975.35 : x
  2. Step 2: Convert to fraction form
    21,145.38/29,167.79 = 13,975.35/x
  3. Step 3: Cross multiply
    21,145.38x = 29,167.79 × 13,975.35
  4. Step 4: Simplify right side
    21,145.38x = 407,630,073.98
  5. Step 5: Solve for x
    x = 407,630,073.98/21,145.38
  6. Step 6: Final answer
    x = 19,277.50

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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.