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Finding the Fourth Proportional to 18,750.28, 25,880.52 and 11,672.50

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Solution

The fourth proportional to 18,750.28, 25,880.52 and 11,672.50 is: 16,111.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.28 : 25,880.52 = 11,672.50 : x
  2. Step 2: Convert to fraction form
    18,750.28/25,880.52 = 11,672.50/x
  3. Step 3: Cross multiply
    18,750.28x = 25,880.52 × 11,672.50
  4. Step 4: Simplify right side
    18,750.28x = 302,090,369.70
  5. Step 5: Solve for x
    x = 302,090,369.70/18,750.28
  6. Step 6: Final answer
    x = 16,111.25

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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.