Home / 20,136.16-30,216.52-12,730.40

Finding the Fourth Proportional to 20,136.16, 30,216.52 and 12,730.40

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Solution

The fourth proportional to 20,136.16, 30,216.52 and 12,730.40 is: 19,103.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.16 : 30,216.52 = 12,730.40 : x
  2. Step 2: Convert to fraction form
    20,136.16/30,216.52 = 12,730.40/x
  3. Step 3: Cross multiply
    20,136.16x = 30,216.52 × 12,730.40
  4. Step 4: Simplify right side
    20,136.16x = 384,668,386.21
  5. Step 5: Solve for x
    x = 384,668,386.21/20,136.16
  6. Step 6: Final answer
    x = 19,103.36

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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.