Home / 7,126.40-9,835.28-3,981.98

Finding the Fourth Proportional to 7,126.40, 9,835.28 and 3,981.98

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Solution

The fourth proportional to 7,126.40, 9,835.28 and 3,981.98 is: 5,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,126.40 : 9,835.28 = 3,981.98 : x
  2. Step 2: Convert to fraction form
    7,126.40/9,835.28 = 3,981.98/x
  3. Step 3: Cross multiply
    7,126.40x = 9,835.28 × 3,981.98
  4. Step 4: Simplify right side
    7,126.40x = 39,163,819.17
  5. Step 5: Solve for x
    x = 39,163,819.17/7,126.40
  6. Step 6: Final answer
    x = 5,495.60

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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.