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Finding the Fourth Proportional to 19,003.65, 28,490.07 and 7,918.65

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Solution

The fourth proportional to 19,003.65, 28,490.07 and 7,918.65 is: 11,871.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,003.65 : 28,490.07 = 7,918.65 : x
  2. Step 2: Convert to fraction form
    19,003.65/28,490.07 = 7,918.65/x
  3. Step 3: Cross multiply
    19,003.65x = 28,490.07 × 7,918.65
  4. Step 4: Simplify right side
    19,003.65x = 225,602,892.81
  5. Step 5: Solve for x
    x = 225,602,892.81/19,003.65
  6. Step 6: Final answer
    x = 11,871.56

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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.