Home / 20,888.55-28,804.95-13,817.25

Finding the Fourth Proportional to 20,888.55, 28,804.95 and 13,817.25

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Solution

The fourth proportional to 20,888.55, 28,804.95 and 13,817.25 is: 19,053.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.55 : 28,804.95 = 13,817.25 : x
  2. Step 2: Convert to fraction form
    20,888.55/28,804.95 = 13,817.25/x
  3. Step 3: Cross multiply
    20,888.55x = 28,804.95 × 13,817.25
  4. Step 4: Simplify right side
    20,888.55x = 398,005,195.39
  5. Step 5: Solve for x
    x = 398,005,195.39/20,888.55
  6. Step 6: Final answer
    x = 19,053.75

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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.