Home / 7,124.12-9,830.38-3,980.44

Finding the Fourth Proportional to 7,124.12, 9,830.38 and 3,980.44

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Solution

The fourth proportional to 7,124.12, 9,830.38 and 3,980.44 is: 5,492.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.12 : 9,830.38 = 3,980.44 : x
  2. Step 2: Convert to fraction form
    7,124.12/9,830.38 = 3,980.44/x
  3. Step 3: Cross multiply
    7,124.12x = 9,830.38 × 3,980.44
  4. Step 4: Simplify right side
    7,124.12x = 39,129,237.77
  5. Step 5: Solve for x
    x = 39,129,237.77/7,124.12
  6. Step 6: Final answer
    x = 5,492.50

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Half scale
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Double scale
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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.