Home / 13,122.72-19,607.27-12,663.36

Finding the Fourth Proportional to 13,122.72, 19,607.27 and 12,663.36

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Solution

The fourth proportional to 13,122.72, 19,607.27 and 12,663.36 is: 18,920.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.72 : 19,607.27 = 12,663.36 : x
  2. Step 2: Convert to fraction form
    13,122.72/19,607.27 = 12,663.36/x
  3. Step 3: Cross multiply
    13,122.72x = 19,607.27 × 12,663.36
  4. Step 4: Simplify right side
    13,122.72x = 248,293,855.31
  5. Step 5: Solve for x
    x = 248,293,855.31/13,122.72
  6. Step 6: Final answer
    x = 18,920.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.