Home / 20,496.40-28,291.80-12,943.60

Finding the Fourth Proportional to 20,496.40, 28,291.80 and 12,943.60

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Solution

The fourth proportional to 20,496.40, 28,291.80 and 12,943.60 is: 17,866.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,496.40 : 28,291.80 = 12,943.60 : x
  2. Step 2: Convert to fraction form
    20,496.40/28,291.80 = 12,943.60/x
  3. Step 3: Cross multiply
    20,496.40x = 28,291.80 × 12,943.60
  4. Step 4: Simplify right side
    20,496.40x = 366,197,742.48
  5. Step 5: Solve for x
    x = 366,197,742.48/20,496.40
  6. Step 6: Final answer
    x = 17,866.44

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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.