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Finding the Fourth Proportional to 28,653.59, 42,980.19 and 15,589

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Solution

The fourth proportional to 28,653.59, 42,980.19 and 15,589 is: 23,383.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,653.59 : 42,980.19 = 15,589 : x
  2. Step 2: Convert to fraction form
    28,653.59/42,980.19 = 15,589/x
  3. Step 3: Cross multiply
    28,653.59x = 42,980.19 × 15,589
  4. Step 4: Simplify right side
    28,653.59x = 670,018,181.91
  5. Step 5: Solve for x
    x = 670,018,181.91/28,653.59
  6. Step 6: Final answer
    x = 23,383.39

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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.