Home / 19,890.52-27,448.88-11,395.40

Finding the Fourth Proportional to 19,890.52, 27,448.88 and 11,395.40

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Solution

The fourth proportional to 19,890.52, 27,448.88 and 11,395.40 is: 15,725.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.52 : 27,448.88 = 11,395.40 : x
  2. Step 2: Convert to fraction form
    19,890.52/27,448.88 = 11,395.40/x
  3. Step 3: Cross multiply
    19,890.52x = 27,448.88 × 11,395.40
  4. Step 4: Simplify right side
    19,890.52x = 312,790,829.91
  5. Step 5: Solve for x
    x = 312,790,829.91/19,890.52
  6. Step 6: Final answer
    x = 15,725.62

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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.