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Finding the Fourth Proportional to 7,515.64, 10,368.90 and 4,999

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Solution

The fourth proportional to 7,515.64, 10,368.90 and 4,999 is: 6,896.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515.64 : 10,368.90 = 4,999 : x
  2. Step 2: Convert to fraction form
    7,515.64/10,368.90 = 4,999/x
  3. Step 3: Cross multiply
    7,515.64x = 10,368.90 × 4,999
  4. Step 4: Simplify right side
    7,515.64x = 51,834,131.10
  5. Step 5: Solve for x
    x = 51,834,131.10/7,515.64
  6. Step 6: Final answer
    x = 6,896.84

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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.