Home / 6,638.40-9,157.95-3,981.24

Finding the Fourth Proportional to 6,638.40, 9,157.95 and 3,981.24

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Solution

The fourth proportional to 6,638.40, 9,157.95 and 3,981.24 is: 5,492.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.40 : 9,157.95 = 3,981.24 : x
  2. Step 2: Convert to fraction form
    6,638.40/9,157.95 = 3,981.24/x
  3. Step 3: Cross multiply
    6,638.40x = 9,157.95 × 3,981.24
  4. Step 4: Simplify right side
    6,638.40x = 36,459,996.86
  5. Step 5: Solve for x
    x = 36,459,996.86/6,638.40
  6. Step 6: Final answer
    x = 5,492.29

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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.