Home / 6,638.90-9,158.64-3,981.74

Finding the Fourth Proportional to 6,638.90, 9,158.64 and 3,981.74

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Solution

The fourth proportional to 6,638.90, 9,158.64 and 3,981.74 is: 5,492.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.90 : 9,158.64 = 3,981.74 : x
  2. Step 2: Convert to fraction form
    6,638.90/9,158.64 = 3,981.74/x
  3. Step 3: Cross multiply
    6,638.90x = 9,158.64 × 3,981.74
  4. Step 4: Simplify right side
    6,638.90x = 36,467,323.23
  5. Step 5: Solve for x
    x = 36,467,323.23/6,638.90
  6. Step 6: Final answer
    x = 5,492.98

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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.