Home / 20,566.40-28,391.50-13,016.39

Finding the Fourth Proportional to 20,566.40, 28,391.50 and 13,016.39

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Solution

The fourth proportional to 20,566.40, 28,391.50 and 13,016.39 is: 17,968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,566.40 : 28,391.50 = 13,016.39 : x
  2. Step 2: Convert to fraction form
    20,566.40/28,391.50 = 13,016.39/x
  3. Step 3: Cross multiply
    20,566.40x = 28,391.50 × 13,016.39
  4. Step 4: Simplify right side
    20,566.40x = 369,554,940.20
  5. Step 5: Solve for x
    x = 369,554,940.20/20,566.40
  6. Step 6: Final answer
    x = 17,968.87

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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.