Home / 7,912-10,918.75-5,122.36

Finding the Fourth Proportional to 7,912, 10,918.75 and 5,122.36

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Solution

The fourth proportional to 7,912, 10,918.75 and 5,122.36 is: 7,068.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912 : 10,918.75 = 5,122.36 : x
  2. Step 2: Convert to fraction form
    7,912/10,918.75 = 5,122.36/x
  3. Step 3: Cross multiply
    7,912x = 10,918.75 × 5,122.36
  4. Step 4: Simplify right side
    7,912x = 55,929,768.25
  5. Step 5: Solve for x
    x = 55,929,768.25/7,912
  6. Step 6: Final answer
    x = 7,068.98

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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.