Home / 28,928.64-43,389.72-19,628.40

Finding the Fourth Proportional to 28,928.64, 43,389.72 and 19,628.40

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Solution

The fourth proportional to 28,928.64, 43,389.72 and 19,628.40 is: 29,440.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,928.64 : 43,389.72 = 19,628.40 : x
  2. Step 2: Convert to fraction form
    28,928.64/43,389.72 = 19,628.40/x
  3. Step 3: Cross multiply
    28,928.64x = 43,389.72 × 19,628.40
  4. Step 4: Simplify right side
    28,928.64x = 851,670,780.05
  5. Step 5: Solve for x
    x = 851,670,780.05/28,928.64
  6. Step 6: Final answer
    x = 29,440.40

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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.