Home / 19,087.60-28,631.40-7,990.60

Finding the Fourth Proportional to 19,087.60, 28,631.40 and 7,990.60

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Solution

The fourth proportional to 19,087.60, 28,631.40 and 7,990.60 is: 11,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,087.60 : 28,631.40 = 7,990.60 : x
  2. Step 2: Convert to fraction form
    19,087.60/28,631.40 = 7,990.60/x
  3. Step 3: Cross multiply
    19,087.60x = 28,631.40 × 7,990.60
  4. Step 4: Simplify right side
    19,087.60x = 228,782,064.84
  5. Step 5: Solve for x
    x = 228,782,064.84/19,087.60
  6. Step 6: Final answer
    x = 11,985.90

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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.