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Finding the Fourth Proportional to 18,140.70, 25,039.40 and 10,970.62

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Solution

The fourth proportional to 18,140.70, 25,039.40 and 10,970.62 is: 15,142.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,140.70 : 25,039.40 = 10,970.62 : x
  2. Step 2: Convert to fraction form
    18,140.70/25,039.40 = 10,970.62/x
  3. Step 3: Cross multiply
    18,140.70x = 25,039.40 × 10,970.62
  4. Step 4: Simplify right side
    18,140.70x = 274,697,742.43
  5. Step 5: Solve for x
    x = 274,697,742.43/18,140.70
  6. Step 6: Final answer
    x = 15,142.62

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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.