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Finding the Fourth Proportional to 18,705.87, 28,053.32 and 15,410.79

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Solution

The fourth proportional to 18,705.87, 28,053.32 and 15,410.79 is: 23,111.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.87 : 28,053.32 = 15,410.79 : x
  2. Step 2: Convert to fraction form
    18,705.87/28,053.32 = 15,410.79/x
  3. Step 3: Cross multiply
    18,705.87x = 28,053.32 × 15,410.79
  4. Step 4: Simplify right side
    18,705.87x = 432,323,746.27
  5. Step 5: Solve for x
    x = 432,323,746.27/18,705.87
  6. Step 6: Final answer
    x = 23,111.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.