Home / 9,408.35-12,985.22-5,428.91

Finding the Fourth Proportional to 9,408.35, 12,985.22 and 5,428.91

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Solution

The fourth proportional to 9,408.35, 12,985.22 and 5,428.91 is: 7,492.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,408.35 : 12,985.22 = 5,428.91 : x
  2. Step 2: Convert to fraction form
    9,408.35/12,985.22 = 5,428.91/x
  3. Step 3: Cross multiply
    9,408.35x = 12,985.22 × 5,428.91
  4. Step 4: Simplify right side
    9,408.35x = 70,495,563.57
  5. Step 5: Solve for x
    x = 70,495,563.57/9,408.35
  6. Step 6: Final answer
    x = 7,492.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.