Home / 28,211.31-42,317.79-12,408.14

Finding the Fourth Proportional to 28,211.31, 42,317.79 and 12,408.14

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Solution

The fourth proportional to 28,211.31, 42,317.79 and 12,408.14 is: 18,612.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.31 : 42,317.79 = 12,408.14 : x
  2. Step 2: Convert to fraction form
    28,211.31/42,317.79 = 12,408.14/x
  3. Step 3: Cross multiply
    28,211.31x = 42,317.79 × 12,408.14
  4. Step 4: Simplify right side
    28,211.31x = 525,085,062.81
  5. Step 5: Solve for x
    x = 525,085,062.81/28,211.31
  6. Step 6: Final answer
    x = 18,612.57

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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.