Home / 12,900.69-19,352.06-5,505.21

Finding the Fourth Proportional to 12,900.69, 19,352.06 and 5,505.21

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Solution

The fourth proportional to 12,900.69, 19,352.06 and 5,505.21 is: 8,258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.69 : 19,352.06 = 5,505.21 : x
  2. Step 2: Convert to fraction form
    12,900.69/19,352.06 = 5,505.21/x
  3. Step 3: Cross multiply
    12,900.69x = 19,352.06 × 5,505.21
  4. Step 4: Simplify right side
    12,900.69x = 106,537,154.23
  5. Step 5: Solve for x
    x = 106,537,154.23/12,900.69
  6. Step 6: Final answer
    x = 8,258.25

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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.