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Finding the Fourth Proportional to 18,085.70, 25,378.30 and 18,085.70

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Solution

The fourth proportional to 18,085.70, 25,378.30 and 18,085.70 is: 25,378.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,085.70 : 25,378.30 = 18,085.70 : x
  2. Step 2: Convert to fraction form
    18,085.70/25,378.30 = 18,085.70/x
  3. Step 3: Cross multiply
    18,085.70x = 25,378.30 × 18,085.70
  4. Step 4: Simplify right side
    18,085.70x = 458,984,320.31
  5. Step 5: Solve for x
    x = 458,984,320.31/18,085.70
  6. Step 6: Final answer
    x = 25,378.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.