Home / 20,889.55-28,806.33-13,818.25

Finding the Fourth Proportional to 20,889.55, 28,806.33 and 13,818.25

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Solution

The fourth proportional to 20,889.55, 28,806.33 and 13,818.25 is: 19,055.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.55 : 28,806.33 = 13,818.25 : x
  2. Step 2: Convert to fraction form
    20,889.55/28,806.33 = 13,818.25/x
  3. Step 3: Cross multiply
    20,889.55x = 28,806.33 × 13,818.25
  4. Step 4: Simplify right side
    20,889.55x = 398,053,069.52
  5. Step 5: Solve for x
    x = 398,053,069.52/20,889.55
  6. Step 6: Final answer
    x = 19,055.13

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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.