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Finding the Fourth Proportional to 19,878.40, 27,460.18 and 18,828.64

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Solution

The fourth proportional to 19,878.40, 27,460.18 and 18,828.64 is: 26,010.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.40 : 27,460.18 = 18,828.64 : x
  2. Step 2: Convert to fraction form
    19,878.40/27,460.18 = 18,828.64/x
  3. Step 3: Cross multiply
    19,878.40x = 27,460.18 × 18,828.64
  4. Step 4: Simplify right side
    19,878.40x = 517,037,843.56
  5. Step 5: Solve for x
    x = 517,037,843.56/19,878.40
  6. Step 6: Final answer
    x = 26,010.03

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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.