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Finding the Fourth Proportional to 19,159.81, 28,739.72 and 5,308.81

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Solution

The fourth proportional to 19,159.81, 28,739.72 and 5,308.81 is: 7,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,159.81 : 28,739.72 = 5,308.81 : x
  2. Step 2: Convert to fraction form
    19,159.81/28,739.72 = 5,308.81/x
  3. Step 3: Cross multiply
    19,159.81x = 28,739.72 × 5,308.81
  4. Step 4: Simplify right side
    19,159.81x = 152,573,654.36
  5. Step 5: Solve for x
    x = 152,573,654.36/19,159.81
  6. Step 6: Final answer
    x = 7,963.21

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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.