Home / 28,308.78-39,055.23-18,236.43

Finding the Fourth Proportional to 28,308.78, 39,055.23 and 18,236.43

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Solution

The fourth proportional to 28,308.78, 39,055.23 and 18,236.43 is: 25,159.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,308.78 : 39,055.23 = 18,236.43 : x
  2. Step 2: Convert to fraction form
    28,308.78/39,055.23 = 18,236.43/x
  3. Step 3: Cross multiply
    28,308.78x = 39,055.23 × 18,236.43
  4. Step 4: Simplify right side
    28,308.78x = 712,227,968.03
  5. Step 5: Solve for x
    x = 712,227,968.03/28,308.78
  6. Step 6: Final answer
    x = 25,159.26

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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.