Home / 15,725.13-21,700.74-8,651.67

Finding the Fourth Proportional to 15,725.13, 21,700.74 and 8,651.67

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Solution

The fourth proportional to 15,725.13, 21,700.74 and 8,651.67 is: 11,939.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,725.13 : 21,700.74 = 8,651.67 : x
  2. Step 2: Convert to fraction form
    15,725.13/21,700.74 = 8,651.67/x
  3. Step 3: Cross multiply
    15,725.13x = 21,700.74 × 8,651.67
  4. Step 4: Simplify right side
    15,725.13x = 187,747,641.24
  5. Step 5: Solve for x
    x = 187,747,641.24/15,725.13
  6. Step 6: Final answer
    x = 11,939.34

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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.