Home / 13,206.78-19,802.88-5,421.06

Finding the Fourth Proportional to 13,206.78, 19,802.88 and 5,421.06

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Solution

The fourth proportional to 13,206.78, 19,802.88 and 5,421.06 is: 8,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,206.78 : 19,802.88 = 5,421.06 : x
  2. Step 2: Convert to fraction form
    13,206.78/19,802.88 = 5,421.06/x
  3. Step 3: Cross multiply
    13,206.78x = 19,802.88 × 5,421.06
  4. Step 4: Simplify right side
    13,206.78x = 107,352,600.65
  5. Step 5: Solve for x
    x = 107,352,600.65/13,206.78
  6. Step 6: Final answer
    x = 8,128.60

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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.