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Finding the Fourth Proportional to 12,666.90, 19,007.19 and 5,276.46

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Solution

The fourth proportional to 12,666.90, 19,007.19 and 5,276.46 is: 7,917.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.90 : 19,007.19 = 5,276.46 : x
  2. Step 2: Convert to fraction form
    12,666.90/19,007.19 = 5,276.46/x
  3. Step 3: Cross multiply
    12,666.90x = 19,007.19 × 5,276.46
  4. Step 4: Simplify right side
    12,666.90x = 100,290,677.75
  5. Step 5: Solve for x
    x = 100,290,677.75/12,666.90
  6. Step 6: Final answer
    x = 7,917.54

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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.