Home / 20,397.36-28,148.79-11,445.51

Finding the Fourth Proportional to 20,397.36, 28,148.79 and 11,445.51

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Solution

The fourth proportional to 20,397.36, 28,148.79 and 11,445.51 is: 15,795.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.36 : 28,148.79 = 11,445.51 : x
  2. Step 2: Convert to fraction form
    20,397.36/28,148.79 = 11,445.51/x
  3. Step 3: Cross multiply
    20,397.36x = 28,148.79 × 11,445.51
  4. Step 4: Simplify right side
    20,397.36x = 322,177,257.43
  5. Step 5: Solve for x
    x = 322,177,257.43/20,397.36
  6. Step 6: Final answer
    x = 15,795.05

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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.