Home / 28,531.23-39,386.84-18,987.03

Finding the Fourth Proportional to 28,531.23, 39,386.84 and 18,987.03

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Solution

The fourth proportional to 28,531.23, 39,386.84 and 18,987.03 is: 26,211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.23 : 39,386.84 = 18,987.03 : x
  2. Step 2: Convert to fraction form
    28,531.23/39,386.84 = 18,987.03/x
  3. Step 3: Cross multiply
    28,531.23x = 39,386.84 × 18,987.03
  4. Step 4: Simplify right side
    28,531.23x = 747,839,112.69
  5. Step 5: Solve for x
    x = 747,839,112.69/28,531.23
  6. Step 6: Final answer
    x = 26,211.25

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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.