Home / 28,412.89-42,627.21-12,403.80

Finding the Fourth Proportional to 28,412.89, 42,627.21 and 12,403.80

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Solution

The fourth proportional to 28,412.89, 42,627.21 and 12,403.80 is: 18,609.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.89 : 42,627.21 = 12,403.80 : x
  2. Step 2: Convert to fraction form
    28,412.89/42,627.21 = 12,403.80/x
  3. Step 3: Cross multiply
    28,412.89x = 42,627.21 × 12,403.80
  4. Step 4: Simplify right side
    28,412.89x = 528,739,387.40
  5. Step 5: Solve for x
    x = 528,739,387.40/28,412.89
  6. Step 6: Final answer
    x = 18,609.14

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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.