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Finding the Fourth Proportional to 18,819.54, 25,970.93 and 10,861.77

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Solution

The fourth proportional to 18,819.54, 25,970.93 and 10,861.77 is: 14,989.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.54 : 25,970.93 = 10,861.77 : x
  2. Step 2: Convert to fraction form
    18,819.54/25,970.93 = 10,861.77/x
  3. Step 3: Cross multiply
    18,819.54x = 25,970.93 × 10,861.77
  4. Step 4: Simplify right side
    18,819.54x = 282,090,268.35
  5. Step 5: Solve for x
    x = 282,090,268.35/18,819.54
  6. Step 6: Final answer
    x = 14,989.22

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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.