Home / 21,143.58-29,178.12-11,584.07

Finding the Fourth Proportional to 21,143.58, 29,178.12 and 11,584.07

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Solution

The fourth proportional to 21,143.58, 29,178.12 and 11,584.07 is: 15,986.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.58 : 29,178.12 = 11,584.07 : x
  2. Step 2: Convert to fraction form
    21,143.58/29,178.12 = 11,584.07/x
  3. Step 3: Cross multiply
    21,143.58x = 29,178.12 × 11,584.07
  4. Step 4: Simplify right side
    21,143.58x = 338,001,384.55
  5. Step 5: Solve for x
    x = 338,001,384.55/21,143.58
  6. Step 6: Final answer
    x = 15,986.01

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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.