Home / 28,148.79-38,845.82-15,403.09

Finding the Fourth Proportional to 28,148.79, 38,845.82 and 15,403.09

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Solution

The fourth proportional to 28,148.79, 38,845.82 and 15,403.09 is: 21,256.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,148.79 : 38,845.82 = 15,403.09 : x
  2. Step 2: Convert to fraction form
    28,148.79/38,845.82 = 15,403.09/x
  3. Step 3: Cross multiply
    28,148.79x = 38,845.82 × 15,403.09
  4. Step 4: Simplify right side
    28,148.79x = 598,345,639.39
  5. Step 5: Solve for x
    x = 598,345,639.39/28,148.79
  6. Step 6: Final answer
    x = 21,256.53

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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.