Home / 12,426.36-17,148.85-7,122.20

Finding the Fourth Proportional to 12,426.36, 17,148.85 and 7,122.20

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Solution

The fourth proportional to 12,426.36, 17,148.85 and 7,122.20 is: 9,828.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,426.36 : 17,148.85 = 7,122.20 : x
  2. Step 2: Convert to fraction form
    12,426.36/17,148.85 = 7,122.20/x
  3. Step 3: Cross multiply
    12,426.36x = 17,148.85 × 7,122.20
  4. Step 4: Simplify right side
    12,426.36x = 122,137,539.47
  5. Step 5: Solve for x
    x = 122,137,539.47/12,426.36
  6. Step 6: Final answer
    x = 9,828.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.