Home / 19,878.40-29,817.39-5,087.20

Finding the Fourth Proportional to 19,878.40, 29,817.39 and 5,087.20

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Solution

The fourth proportional to 19,878.40, 29,817.39 and 5,087.20 is: 7,630.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.40 : 29,817.39 = 5,087.20 : x
  2. Step 2: Convert to fraction form
    19,878.40/29,817.39 = 5,087.20/x
  3. Step 3: Cross multiply
    19,878.40x = 29,817.39 × 5,087.20
  4. Step 4: Simplify right side
    19,878.40x = 151,687,026.41
  5. Step 5: Solve for x
    x = 151,687,026.41/19,878.40
  6. Step 6: Final answer
    x = 7,630.75

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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.