Home / 20,386.26-28,106.73-13,672.98

Finding the Fourth Proportional to 20,386.26, 28,106.73 and 13,672.98

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Solution

The fourth proportional to 20,386.26, 28,106.73 and 13,672.98 is: 18,851.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.26 : 28,106.73 = 13,672.98 : x
  2. Step 2: Convert to fraction form
    20,386.26/28,106.73 = 13,672.98/x
  3. Step 3: Cross multiply
    20,386.26x = 28,106.73 × 13,672.98
  4. Step 4: Simplify right side
    20,386.26x = 384,302,757.16
  5. Step 5: Solve for x
    x = 384,302,757.16/20,386.26
  6. Step 6: Final answer
    x = 18,851.07

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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.