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Finding the Fourth Proportional to 28,904.81, 43,357.23 and 8,128.31

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Solution

The fourth proportional to 28,904.81, 43,357.23 and 8,128.31 is: 12,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,904.81 : 43,357.23 = 8,128.31 : x
  2. Step 2: Convert to fraction form
    28,904.81/43,357.23 = 8,128.31/x
  3. Step 3: Cross multiply
    28,904.81x = 43,357.23 × 8,128.31
  4. Step 4: Simplify right side
    28,904.81x = 352,421,114.57
  5. Step 5: Solve for x
    x = 352,421,114.57/28,904.81
  6. Step 6: Final answer
    x = 12,192.47

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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.