Home / 28,195.40-38,870.16-19,685.36

Finding the Fourth Proportional to 28,195.40, 38,870.16 and 19,685.36

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Solution

The fourth proportional to 28,195.40, 38,870.16 and 19,685.36 is: 27,138.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,195.40 : 38,870.16 = 19,685.36 : x
  2. Step 2: Convert to fraction form
    28,195.40/38,870.16 = 19,685.36/x
  3. Step 3: Cross multiply
    28,195.40x = 38,870.16 × 19,685.36
  4. Step 4: Simplify right side
    28,195.40x = 765,173,092.86
  5. Step 5: Solve for x
    x = 765,173,092.86/28,195.40
  6. Step 6: Final answer
    x = 27,138.22

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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.