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Finding the Fourth Proportional to 19,141.40, 28,710.48 and 8,047.64

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Solution

The fourth proportional to 19,141.40, 28,710.48 and 8,047.64 is: 12,070.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,141.40 : 28,710.48 = 8,047.64 : x
  2. Step 2: Convert to fraction form
    19,141.40/28,710.48 = 8,047.64/x
  3. Step 3: Cross multiply
    19,141.40x = 28,710.48 × 8,047.64
  4. Step 4: Simplify right side
    19,141.40x = 231,051,607.27
  5. Step 5: Solve for x
    x = 231,051,607.27/19,141.40
  6. Step 6: Final answer
    x = 12,070.78

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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.