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Finding the Fourth Proportional to 9,503.40, 13,115.80 and 7,907.22

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Solution

The fourth proportional to 9,503.40, 13,115.80 and 7,907.22 is: 10,912.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,503.40 : 13,115.80 = 7,907.22 : x
  2. Step 2: Convert to fraction form
    9,503.40/13,115.80 = 7,907.22/x
  3. Step 3: Cross multiply
    9,503.40x = 13,115.80 × 7,907.22
  4. Step 4: Simplify right side
    9,503.40x = 103,709,516.08
  5. Step 5: Solve for x
    x = 103,709,516.08/9,503.40
  6. Step 6: Final answer
    x = 10,912.89

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Half 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.