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Finding the Fourth Proportional to 12,854.01, 19,281.63 and 4,089

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Solution

The fourth proportional to 12,854.01, 19,281.63 and 4,089 is: 6,133.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,854.01 : 19,281.63 = 4,089 : x
  2. Step 2: Convert to fraction form
    12,854.01/19,281.63 = 4,089/x
  3. Step 3: Cross multiply
    12,854.01x = 19,281.63 × 4,089
  4. Step 4: Simplify right side
    12,854.01x = 78,842,585.07
  5. Step 5: Solve for x
    x = 78,842,585.07/12,854.01
  6. Step 6: Final answer
    x = 6,133.70

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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.