Home / 20,813.47-28,725.98-15,471.39

Finding the Fourth Proportional to 20,813.47, 28,725.98 and 15,471.39

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Solution

The fourth proportional to 20,813.47, 28,725.98 and 15,471.39 is: 21,353.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.47 : 28,725.98 = 15,471.39 : x
  2. Step 2: Convert to fraction form
    20,813.47/28,725.98 = 15,471.39/x
  3. Step 3: Cross multiply
    20,813.47x = 28,725.98 × 15,471.39
  4. Step 4: Simplify right side
    20,813.47x = 444,430,734.76
  5. Step 5: Solve for x
    x = 444,430,734.76/20,813.47
  6. Step 6: Final answer
    x = 21,353.03

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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.