Home / 21,276.81-29,358.59-11,843.55

Finding the Fourth Proportional to 21,276.81, 29,358.59 and 11,843.55

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Solution

The fourth proportional to 21,276.81, 29,358.59 and 11,843.55 is: 16,342.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.81 : 29,358.59 = 11,843.55 : x
  2. Step 2: Convert to fraction form
    21,276.81/29,358.59 = 11,843.55/x
  3. Step 3: Cross multiply
    21,276.81x = 29,358.59 × 11,843.55
  4. Step 4: Simplify right side
    21,276.81x = 347,709,869.38
  5. Step 5: Solve for x
    x = 347,709,869.38/21,276.81
  6. Step 6: Final answer
    x = 16,342.20

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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.