Home / 28,187.49-38,898.31-15,440.57

Finding the Fourth Proportional to 28,187.49, 38,898.31 and 15,440.57

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Solution

The fourth proportional to 28,187.49, 38,898.31 and 15,440.57 is: 21,307.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.49 : 38,898.31 = 15,440.57 : x
  2. Step 2: Convert to fraction form
    28,187.49/38,898.31 = 15,440.57/x
  3. Step 3: Cross multiply
    28,187.49x = 38,898.31 × 15,440.57
  4. Step 4: Simplify right side
    28,187.49x = 600,612,078.44
  5. Step 5: Solve for x
    x = 600,612,078.44/28,187.49
  6. Step 6: Final answer
    x = 21,307.75

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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.