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Finding the Fourth Proportional to 28,689.63, 42,954.62 and 14,619.32

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Solution

The fourth proportional to 28,689.63, 42,954.62 and 14,619.32 is: 21,888.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.63 : 42,954.62 = 14,619.32 : x
  2. Step 2: Convert to fraction form
    28,689.63/42,954.62 = 14,619.32/x
  3. Step 3: Cross multiply
    28,689.63x = 42,954.62 × 14,619.32
  4. Step 4: Simplify right side
    28,689.63x = 627,967,047.39
  5. Step 5: Solve for x
    x = 627,967,047.39/28,689.63
  6. Step 6: Final answer
    x = 21,888.29

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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.