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Finding the Fourth Proportional to 28,244.64, 38,978.64 and 17,064.48

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Solution

The fourth proportional to 28,244.64, 38,978.64 and 17,064.48 is: 23,549.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,244.64 : 38,978.64 = 17,064.48 : x
  2. Step 2: Convert to fraction form
    28,244.64/38,978.64 = 17,064.48/x
  3. Step 3: Cross multiply
    28,244.64x = 38,978.64 × 17,064.48
  4. Step 4: Simplify right side
    28,244.64x = 665,150,222.71
  5. Step 5: Solve for x
    x = 665,150,222.71/28,244.64
  6. Step 6: Final answer
    x = 23,549.61

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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.