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Finding the Fourth Proportional to 28,661.40, 42,992.10 and 25,599.60

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Solution

The fourth proportional to 28,661.40, 42,992.10 and 25,599.60 is: 38,399.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.40 : 42,992.10 = 25,599.60 : x
  2. Step 2: Convert to fraction form
    28,661.40/42,992.10 = 25,599.60/x
  3. Step 3: Cross multiply
    28,661.40x = 42,992.10 × 25,599.60
  4. Step 4: Simplify right side
    28,661.40x = 1,100,580,563.16
  5. Step 5: Solve for x
    x = 1,100,580,563.16/28,661.40
  6. Step 6: Final answer
    x = 38,399.40

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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.