Home / 20,970.21-28,939.38-11,410.65

Finding the Fourth Proportional to 20,970.21, 28,939.38 and 11,410.65

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Solution

The fourth proportional to 20,970.21, 28,939.38 and 11,410.65 is: 15,746.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.21 : 28,939.38 = 11,410.65 : x
  2. Step 2: Convert to fraction form
    20,970.21/28,939.38 = 11,410.65/x
  3. Step 3: Cross multiply
    20,970.21x = 28,939.38 × 11,410.65
  4. Step 4: Simplify right side
    20,970.21x = 330,217,136.40
  5. Step 5: Solve for x
    x = 330,217,136.40/20,970.21
  6. Step 6: Final answer
    x = 15,746.96

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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.