Home / 45,408.33-68,111.75-20,430.72

Finding the Fourth Proportional to 45,408.33, 68,111.75 and 20,430.72

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Solution

The fourth proportional to 45,408.33, 68,111.75 and 20,430.72 is: 30,645.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,408.33 : 68,111.75 = 20,430.72 : x
  2. Step 2: Convert to fraction form
    45,408.33/68,111.75 = 20,430.72/x
  3. Step 3: Cross multiply
    45,408.33x = 68,111.75 × 20,430.72
  4. Step 4: Simplify right side
    45,408.33x = 1,391,571,990.81
  5. Step 5: Solve for x
    x = 1,391,571,990.81/45,408.33
  6. Step 6: Final answer
    x = 30,645.74

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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.