Home / 28,403.25-42,610.35-12,820.89

Finding the Fourth Proportional to 28,403.25, 42,610.35 and 12,820.89

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Solution

The fourth proportional to 28,403.25, 42,610.35 and 12,820.89 is: 19,233.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.25 : 42,610.35 = 12,820.89 : x
  2. Step 2: Convert to fraction form
    28,403.25/42,610.35 = 12,820.89/x
  3. Step 3: Cross multiply
    28,403.25x = 42,610.35 × 12,820.89
  4. Step 4: Simplify right side
    28,403.25x = 546,302,610.21
  5. Step 5: Solve for x
    x = 546,302,610.21/28,403.25
  6. Step 6: Final answer
    x = 19,233.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.