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Finding the Fourth Proportional to 28,160.64, 38,862.72 and 16,980.48

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Solution

The fourth proportional to 28,160.64, 38,862.72 and 16,980.48 is: 23,433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,160.64 : 38,862.72 = 16,980.48 : x
  2. Step 2: Convert to fraction form
    28,160.64/38,862.72 = 16,980.48/x
  3. Step 3: Cross multiply
    28,160.64x = 38,862.72 × 16,980.48
  4. Step 4: Simplify right side
    28,160.64x = 659,907,639.71
  5. Step 5: Solve for x
    x = 659,907,639.71/28,160.64
  6. Step 6: Final answer
    x = 23,433.69

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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.