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Finding the Fourth Proportional to 7,813.53, 11,720.36 and 1,970.19

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Solution

The fourth proportional to 7,813.53, 11,720.36 and 1,970.19 is: 2,955.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,813.53 : 11,720.36 = 1,970.19 : x
  2. Step 2: Convert to fraction form
    7,813.53/11,720.36 = 1,970.19/x
  3. Step 3: Cross multiply
    7,813.53x = 11,720.36 × 1,970.19
  4. Step 4: Simplify right side
    7,813.53x = 23,091,340.99
  5. Step 5: Solve for x
    x = 23,091,340.99/7,813.53
  6. Step 6: Final answer
    x = 2,955.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.