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Finding the Fourth Proportional to 18,671.33, 25,730.99 and 13,356.92

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Solution

The fourth proportional to 18,671.33, 25,730.99 and 13,356.92 is: 18,407.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.33 : 25,730.99 = 13,356.92 : x
  2. Step 2: Convert to fraction form
    18,671.33/25,730.99 = 13,356.92/x
  3. Step 3: Cross multiply
    18,671.33x = 25,730.99 × 13,356.92
  4. Step 4: Simplify right side
    18,671.33x = 343,686,579.51
  5. Step 5: Solve for x
    x = 343,686,579.51/18,671.33
  6. Step 6: Final answer
    x = 18,407.19

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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.