Home / 21,025.55-28,981.42-15,351.30

Finding the Fourth Proportional to 21,025.55, 28,981.42 and 15,351.30

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Solution

The fourth proportional to 21,025.55, 28,981.42 and 15,351.30 is: 21,160.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.55 : 28,981.42 = 15,351.30 : x
  2. Step 2: Convert to fraction form
    21,025.55/28,981.42 = 15,351.30/x
  3. Step 3: Cross multiply
    21,025.55x = 28,981.42 × 15,351.30
  4. Step 4: Simplify right side
    21,025.55x = 444,902,434.47
  5. Step 5: Solve for x
    x = 444,902,434.47/21,025.55
  6. Step 6: Final answer
    x = 21,160.08

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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.