Home / 15,013.71-20,720.67-12,491.37

Finding the Fourth Proportional to 15,013.71, 20,720.67 and 12,491.37

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Solution

The fourth proportional to 15,013.71, 20,720.67 and 12,491.37 is: 17,239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.71 : 20,720.67 = 12,491.37 : x
  2. Step 2: Convert to fraction form
    15,013.71/20,720.67 = 12,491.37/x
  3. Step 3: Cross multiply
    15,013.71x = 20,720.67 × 12,491.37
  4. Step 4: Simplify right side
    15,013.71x = 258,829,555.62
  5. Step 5: Solve for x
    x = 258,829,555.62/15,013.71
  6. Step 6: Final answer
    x = 17,239.55

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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.