Home / 20,602.04-28,422.77-13,440.38

Finding the Fourth Proportional to 20,602.04, 28,422.77 and 13,440.38

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Solution

The fourth proportional to 20,602.04, 28,422.77 and 13,440.38 is: 18,542.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.04 : 28,422.77 = 13,440.38 : x
  2. Step 2: Convert to fraction form
    20,602.04/28,422.77 = 13,440.38/x
  3. Step 3: Cross multiply
    20,602.04x = 28,422.77 × 13,440.38
  4. Step 4: Simplify right side
    20,602.04x = 382,012,720.94
  5. Step 5: Solve for x
    x = 382,012,720.94/20,602.04
  6. Step 6: Final answer
    x = 18,542.48

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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.