Home / 12,920.18-19,390.59-6,681.98

Finding the Fourth Proportional to 12,920.18, 19,390.59 and 6,681.98

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Solution

The fourth proportional to 12,920.18, 19,390.59 and 6,681.98 is: 10,028.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.18 : 19,390.59 = 6,681.98 : x
  2. Step 2: Convert to fraction form
    12,920.18/19,390.59 = 6,681.98/x
  3. Step 3: Cross multiply
    12,920.18x = 19,390.59 × 6,681.98
  4. Step 4: Simplify right side
    12,920.18x = 129,567,473.97
  5. Step 5: Solve for x
    x = 129,567,473.97/12,920.18
  6. Step 6: Final answer
    x = 10,028.31

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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.