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Finding the Fourth Proportional to 19,009.79, 28,514.70 and 5,158.79

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Solution

The fourth proportional to 19,009.79, 28,514.70 and 5,158.79 is: 7,738.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.79 : 28,514.70 = 5,158.79 : x
  2. Step 2: Convert to fraction form
    19,009.79/28,514.70 = 5,158.79/x
  3. Step 3: Cross multiply
    19,009.79x = 28,514.70 × 5,158.79
  4. Step 4: Simplify right side
    19,009.79x = 147,101,349.21
  5. Step 5: Solve for x
    x = 147,101,349.21/19,009.79
  6. Step 6: Final answer
    x = 7,738.19

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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.