Home / 31,615.93-43,638.77-18,191.50

Finding the Fourth Proportional to 31,615.93, 43,638.77 and 18,191.50

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Solution

The fourth proportional to 31,615.93, 43,638.77 and 18,191.50 is: 25,109.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615.93 : 43,638.77 = 18,191.50 : x
  2. Step 2: Convert to fraction form
    31,615.93/43,638.77 = 18,191.50/x
  3. Step 3: Cross multiply
    31,615.93x = 43,638.77 × 18,191.50
  4. Step 4: Simplify right side
    31,615.93x = 793,854,866.30
  5. Step 5: Solve for x
    x = 793,854,866.30/31,615.93
  6. Step 6: Final answer
    x = 25,109.33

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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.