Home / 18,271.98-25,193.43-15,582.78

Finding the Fourth Proportional to 18,271.98, 25,193.43 and 15,582.78

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Solution

The fourth proportional to 18,271.98, 25,193.43 and 15,582.78 is: 21,485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,271.98 : 25,193.43 = 15,582.78 : x
  2. Step 2: Convert to fraction form
    18,271.98/25,193.43 = 15,582.78/x
  3. Step 3: Cross multiply
    18,271.98x = 25,193.43 × 15,582.78
  4. Step 4: Simplify right side
    18,271.98x = 392,583,677.14
  5. Step 5: Solve for x
    x = 392,583,677.14/18,271.98
  6. Step 6: Final answer
    x = 21,485.56

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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.