Home / 12,690.90-19,044.80-5,668.58

Finding the Fourth Proportional to 12,690.90, 19,044.80 and 5,668.58

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Solution

The fourth proportional to 12,690.90, 19,044.80 and 5,668.58 is: 8,506.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.90 : 19,044.80 = 5,668.58 : x
  2. Step 2: Convert to fraction form
    12,690.90/19,044.80 = 5,668.58/x
  3. Step 3: Cross multiply
    12,690.90x = 19,044.80 × 5,668.58
  4. Step 4: Simplify right side
    12,690.90x = 107,956,972.38
  5. Step 5: Solve for x
    x = 107,956,972.38/12,690.90
  6. Step 6: Final answer
    x = 8,506.64

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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.