Home / 20,188.04-30,128.56-18,851.13

Finding the Fourth Proportional to 20,188.04, 30,128.56 and 18,851.13

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Solution

The fourth proportional to 20,188.04, 30,128.56 and 18,851.13 is: 28,133.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.04 : 30,128.56 = 18,851.13 : x
  2. Step 2: Convert to fraction form
    20,188.04/30,128.56 = 18,851.13/x
  3. Step 3: Cross multiply
    20,188.04x = 30,128.56 × 18,851.13
  4. Step 4: Simplify right side
    20,188.04x = 567,957,354.14
  5. Step 5: Solve for x
    x = 567,957,354.14/20,188.04
  6. Step 6: Final answer
    x = 28,133.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.