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Finding the Fourth Proportional to 28,382.50, 39,164.90 and 17,478.90

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Solution

The fourth proportional to 28,382.50, 39,164.90 and 17,478.90 is: 24,119.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.50 : 39,164.90 = 17,478.90 : x
  2. Step 2: Convert to fraction form
    28,382.50/39,164.90 = 17,478.90/x
  3. Step 3: Cross multiply
    28,382.50x = 39,164.90 × 17,478.90
  4. Step 4: Simplify right side
    28,382.50x = 684,559,283.22
  5. Step 5: Solve for x
    x = 684,559,283.22/28,382.50
  6. Step 6: Final answer
    x = 24,119.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.