Home / 12,730.60-19,106.70-5,721.40

Finding the Fourth Proportional to 12,730.60, 19,106.70 and 5,721.40

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Solution

The fourth proportional to 12,730.60, 19,106.70 and 5,721.40 is: 8,586.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,730.60 : 19,106.70 = 5,721.40 : x
  2. Step 2: Convert to fraction form
    12,730.60/19,106.70 = 5,721.40/x
  3. Step 3: Cross multiply
    12,730.60x = 19,106.70 × 5,721.40
  4. Step 4: Simplify right side
    12,730.60x = 109,317,073.38
  5. Step 5: Solve for x
    x = 109,317,073.38/12,730.60
  6. Step 6: Final answer
    x = 8,586.95

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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.