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Finding the Fourth Proportional to 10,369.68, 15,554.52 and 8,978.64

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Solution

The fourth proportional to 10,369.68, 15,554.52 and 8,978.64 is: 13,467.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,369.68 : 15,554.52 = 8,978.64 : x
  2. Step 2: Convert to fraction form
    10,369.68/15,554.52 = 8,978.64/x
  3. Step 3: Cross multiply
    10,369.68x = 15,554.52 × 8,978.64
  4. Step 4: Simplify right side
    10,369.68x = 139,658,435.45
  5. Step 5: Solve for x
    x = 139,658,435.45/10,369.68
  6. Step 6: Final answer
    x = 13,467.96

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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.