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Finding the Fourth Proportional to 30,928.72, 46,387.72 and 14,287.36

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Solution

The fourth proportional to 30,928.72, 46,387.72 and 14,287.36 is: 21,428.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.72 : 46,387.72 = 14,287.36 : x
  2. Step 2: Convert to fraction form
    30,928.72/46,387.72 = 14,287.36/x
  3. Step 3: Cross multiply
    30,928.72x = 46,387.72 × 14,287.36
  4. Step 4: Simplify right side
    30,928.72x = 662,758,055.22
  5. Step 5: Solve for x
    x = 662,758,055.22/30,928.72
  6. Step 6: Final answer
    x = 21,428.56

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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.