Home / 28,974.56-39,985.68-16,400

Finding the Fourth Proportional to 28,974.56, 39,985.68 and 16,400

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Solution

The fourth proportional to 28,974.56, 39,985.68 and 16,400 is: 22,632.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,974.56 : 39,985.68 = 16,400 : x
  2. Step 2: Convert to fraction form
    28,974.56/39,985.68 = 16,400/x
  3. Step 3: Cross multiply
    28,974.56x = 39,985.68 × 16,400
  4. Step 4: Simplify right side
    28,974.56x = 655,765,152
  5. Step 5: Solve for x
    x = 655,765,152/28,974.56
  6. Step 6: Final answer
    x = 22,632.45

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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.