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Finding the Fourth Proportional to 28,412.72, 42,619.14 and 7,636.22

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Solution

The fourth proportional to 28,412.72, 42,619.14 and 7,636.22 is: 11,454.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.72 : 42,619.14 = 7,636.22 : x
  2. Step 2: Convert to fraction form
    28,412.72/42,619.14 = 7,636.22/x
  3. Step 3: Cross multiply
    28,412.72x = 42,619.14 × 7,636.22
  4. Step 4: Simplify right side
    28,412.72x = 325,448,916.16
  5. Step 5: Solve for x
    x = 325,448,916.16/28,412.72
  6. Step 6: Final answer
    x = 11,454.34

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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.