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Finding the Fourth Proportional to 19,076.60, 28,607.70 and 7,984.05

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Solution

The fourth proportional to 19,076.60, 28,607.70 and 7,984.05 is: 11,973.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,076.60 : 28,607.70 = 7,984.05 : x
  2. Step 2: Convert to fraction form
    19,076.60/28,607.70 = 7,984.05/x
  3. Step 3: Cross multiply
    19,076.60x = 28,607.70 × 7,984.05
  4. Step 4: Simplify right side
    19,076.60x = 228,405,307.19
  5. Step 5: Solve for x
    x = 228,405,307.19/19,076.60
  6. Step 6: Final answer
    x = 11,973.06

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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.