Home / 28,546.16-39,431.35-21,913.75

Finding the Fourth Proportional to 28,546.16, 39,431.35 and 21,913.75

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Solution

The fourth proportional to 28,546.16, 39,431.35 and 21,913.75 is: 30,269.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,546.16 : 39,431.35 = 21,913.75 : x
  2. Step 2: Convert to fraction form
    28,546.16/39,431.35 = 21,913.75/x
  3. Step 3: Cross multiply
    28,546.16x = 39,431.35 × 21,913.75
  4. Step 4: Simplify right side
    28,546.16x = 864,088,746.06
  5. Step 5: Solve for x
    x = 864,088,746.06/28,546.16
  6. Step 6: Final answer
    x = 30,269.88

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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.