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Finding the Fourth Proportional to 34,987.97, 48,281.64 and 19,878.63

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Solution

The fourth proportional to 34,987.97, 48,281.64 and 19,878.63 is: 27,431.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,987.97 : 48,281.64 = 19,878.63 : x
  2. Step 2: Convert to fraction form
    34,987.97/48,281.64 = 19,878.63/x
  3. Step 3: Cross multiply
    34,987.97x = 48,281.64 × 19,878.63
  4. Step 4: Simplify right side
    34,987.97x = 959,772,857.35
  5. Step 5: Solve for x
    x = 959,772,857.35/34,987.97
  6. Step 6: Final answer
    x = 27,431.51

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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.