Home / 13,089.98-18,063.87-7,121.63

Finding the Fourth Proportional to 13,089.98, 18,063.87 and 7,121.63

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Solution

The fourth proportional to 13,089.98, 18,063.87 and 7,121.63 is: 9,827.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.98 : 18,063.87 = 7,121.63 : x
  2. Step 2: Convert to fraction form
    13,089.98/18,063.87 = 7,121.63/x
  3. Step 3: Cross multiply
    13,089.98x = 18,063.87 × 7,121.63
  4. Step 4: Simplify right side
    13,089.98x = 128,644,198.51
  5. Step 5: Solve for x
    x = 128,644,198.51/13,089.98
  6. Step 6: Final answer
    x = 9,827.68

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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.