Home / 28,985.22-39,992.40-18,370.98

Finding the Fourth Proportional to 28,985.22, 39,992.40 and 18,370.98

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Solution

The fourth proportional to 28,985.22, 39,992.40 and 18,370.98 is: 25,347.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,985.22 : 39,992.40 = 18,370.98 : x
  2. Step 2: Convert to fraction form
    28,985.22/39,992.40 = 18,370.98/x
  3. Step 3: Cross multiply
    28,985.22x = 39,992.40 × 18,370.98
  4. Step 4: Simplify right side
    28,985.22x = 734,699,580.55
  5. Step 5: Solve for x
    x = 734,699,580.55/28,985.22
  6. Step 6: Final answer
    x = 25,347.39

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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.