Home / 15,369.90-21,072.20-15,089.69

Finding the Fourth Proportional to 15,369.90, 21,072.20 and 15,089.69

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Solution

The fourth proportional to 15,369.90, 21,072.20 and 15,089.69 is: 20,688.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.90 : 21,072.20 = 15,089.69 : x
  2. Step 2: Convert to fraction form
    15,369.90/21,072.20 = 15,089.69/x
  3. Step 3: Cross multiply
    15,369.90x = 21,072.20 × 15,089.69
  4. Step 4: Simplify right side
    15,369.90x = 317,972,897.98
  5. Step 5: Solve for x
    x = 317,972,897.98/15,369.90
  6. Step 6: Final answer
    x = 20,688.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.