Home / 20,868.04-28,825.50-15,553.63

Finding the Fourth Proportional to 20,868.04, 28,825.50 and 15,553.63

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Solution

The fourth proportional to 20,868.04, 28,825.50 and 15,553.63 is: 21,484.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.04 : 28,825.50 = 15,553.63 : x
  2. Step 2: Convert to fraction form
    20,868.04/28,825.50 = 15,553.63/x
  3. Step 3: Cross multiply
    20,868.04x = 28,825.50 × 15,553.63
  4. Step 4: Simplify right side
    20,868.04x = 448,341,161.57
  5. Step 5: Solve for x
    x = 448,341,161.57/20,868.04
  6. Step 6: Final answer
    x = 21,484.58

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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.