Home / 20,667.65-31,012.10-10,137.51

Finding the Fourth Proportional to 20,667.65, 31,012.10 and 10,137.51

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Solution

The fourth proportional to 20,667.65, 31,012.10 and 10,137.51 is: 15,211.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.65 : 31,012.10 = 10,137.51 : x
  2. Step 2: Convert to fraction form
    20,667.65/31,012.10 = 10,137.51/x
  3. Step 3: Cross multiply
    20,667.65x = 31,012.10 × 10,137.51
  4. Step 4: Simplify right side
    20,667.65x = 314,385,423.18
  5. Step 5: Solve for x
    x = 314,385,423.18/20,667.65
  6. Step 6: Final answer
    x = 15,211.48

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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.