Home / 20,985.18-28,964.48-13,033.41

Finding the Fourth Proportional to 20,985.18, 28,964.48 and 13,033.41

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Solution

The fourth proportional to 20,985.18, 28,964.48 and 13,033.41 is: 17,989.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.18 : 28,964.48 = 13,033.41 : x
  2. Step 2: Convert to fraction form
    20,985.18/28,964.48 = 13,033.41/x
  3. Step 3: Cross multiply
    20,985.18x = 28,964.48 × 13,033.41
  4. Step 4: Simplify right side
    20,985.18x = 377,505,943.28
  5. Step 5: Solve for x
    x = 377,505,943.28/20,985.18
  6. Step 6: Final answer
    x = 17,989.17

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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.