Home / 28,099.68-38,775.60-15,522.72

Finding the Fourth Proportional to 28,099.68, 38,775.60 and 15,522.72

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Solution

The fourth proportional to 28,099.68, 38,775.60 and 15,522.72 is: 21,420.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,099.68 : 38,775.60 = 15,522.72 : x
  2. Step 2: Convert to fraction form
    28,099.68/38,775.60 = 15,522.72/x
  3. Step 3: Cross multiply
    28,099.68x = 38,775.60 × 15,522.72
  4. Step 4: Simplify right side
    28,099.68x = 601,902,781.63
  5. Step 5: Solve for x
    x = 601,902,781.63/28,099.68
  6. Step 6: Final answer
    x = 21,420.27

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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.