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Finding the Fourth Proportional to 9,877.80, 14,784.30 and 7,674.60

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Solution

The fourth proportional to 9,877.80, 14,784.30 and 7,674.60 is: 11,486.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,877.80 : 14,784.30 = 7,674.60 : x
  2. Step 2: Convert to fraction form
    9,877.80/14,784.30 = 7,674.60/x
  3. Step 3: Cross multiply
    9,877.80x = 14,784.30 × 7,674.60
  4. Step 4: Simplify right side
    9,877.80x = 113,463,588.78
  5. Step 5: Solve for x
    x = 113,463,588.78/9,877.80
  6. Step 6: Final answer
    x = 11,486.73

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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.