Home / 28,402.75-42,609.60-12,820.39

Finding the Fourth Proportional to 28,402.75, 42,609.60 and 12,820.39

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Solution

The fourth proportional to 28,402.75, 42,609.60 and 12,820.39 is: 19,233.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,402.75 : 42,609.60 = 12,820.39 : x
  2. Step 2: Convert to fraction form
    28,402.75/42,609.60 = 12,820.39/x
  3. Step 3: Cross multiply
    28,402.75x = 42,609.60 × 12,820.39
  4. Step 4: Simplify right side
    28,402.75x = 546,271,689.74
  5. Step 5: Solve for x
    x = 546,271,689.74/28,402.75
  6. Step 6: Final answer
    x = 19,233.06

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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.