Home / 12,815.13-19,225.35-5,419.65

Finding the Fourth Proportional to 12,815.13, 19,225.35 and 5,419.65

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Solution

The fourth proportional to 12,815.13, 19,225.35 and 5,419.65 is: 8,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.13 : 19,225.35 = 5,419.65 : x
  2. Step 2: Convert to fraction form
    12,815.13/19,225.35 = 5,419.65/x
  3. Step 3: Cross multiply
    12,815.13x = 19,225.35 × 5,419.65
  4. Step 4: Simplify right side
    12,815.13x = 104,194,668.13
  5. Step 5: Solve for x
    x = 104,194,668.13/12,815.13
  6. Step 6: Final answer
    x = 8,130.60

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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.