Home / 28,106.57-38,786.59-15,359.47

Finding the Fourth Proportional to 28,106.57, 38,786.59 and 15,359.47

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Solution

The fourth proportional to 28,106.57, 38,786.59 and 15,359.47 is: 21,195.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.57 : 38,786.59 = 15,359.47 : x
  2. Step 2: Convert to fraction form
    28,106.57/38,786.59 = 15,359.47/x
  3. Step 3: Cross multiply
    28,106.57x = 38,786.59 × 15,359.47
  4. Step 4: Simplify right side
    28,106.57x = 595,741,465.51
  5. Step 5: Solve for x
    x = 595,741,465.51/28,106.57
  6. Step 6: Final answer
    x = 21,195.81

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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.