Home / 28,168.54-38,872.24-15,421.57

Finding the Fourth Proportional to 28,168.54, 38,872.24 and 15,421.57

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Solution

The fourth proportional to 28,168.54, 38,872.24 and 15,421.57 is: 21,281.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,168.54 : 38,872.24 = 15,421.57 : x
  2. Step 2: Convert to fraction form
    28,168.54/38,872.24 = 15,421.57/x
  3. Step 3: Cross multiply
    28,168.54x = 38,872.24 × 15,421.57
  4. Step 4: Simplify right side
    28,168.54x = 599,470,970.22
  5. Step 5: Solve for x
    x = 599,470,970.22/28,168.54
  6. Step 6: Final answer
    x = 21,281.58

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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.