Home / 20,998.30-28,953.60-15,684.16

Finding the Fourth Proportional to 20,998.30, 28,953.60 and 15,684.16

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Solution

The fourth proportional to 20,998.30, 28,953.60 and 15,684.16 is: 21,626.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.30 : 28,953.60 = 15,684.16 : x
  2. Step 2: Convert to fraction form
    20,998.30/28,953.60 = 15,684.16/x
  3. Step 3: Cross multiply
    20,998.30x = 28,953.60 × 15,684.16
  4. Step 4: Simplify right side
    20,998.30x = 454,112,894.98
  5. Step 5: Solve for x
    x = 454,112,894.98/20,998.30
  6. Step 6: Final answer
    x = 21,626.17

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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.