Home / 20,281.11-28,000.77-13,918.35

Finding the Fourth Proportional to 20,281.11, 28,000.77 and 13,918.35

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Solution

The fourth proportional to 20,281.11, 28,000.77 and 13,918.35 is: 19,216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.11 : 28,000.77 = 13,918.35 : x
  2. Step 2: Convert to fraction form
    20,281.11/28,000.77 = 13,918.35/x
  3. Step 3: Cross multiply
    20,281.11x = 28,000.77 × 13,918.35
  4. Step 4: Simplify right side
    20,281.11x = 389,724,517.13
  5. Step 5: Solve for x
    x = 389,724,517.13/20,281.11
  6. Step 6: Final answer
    x = 19,216.13

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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.