Home / 20,871.10-28,802.13-11,311.08

Finding the Fourth Proportional to 20,871.10, 28,802.13 and 11,311.08

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Solution

The fourth proportional to 20,871.10, 28,802.13 and 11,311.08 is: 15,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.10 : 28,802.13 = 11,311.08 : x
  2. Step 2: Convert to fraction form
    20,871.10/28,802.13 = 11,311.08/x
  3. Step 3: Cross multiply
    20,871.10x = 28,802.13 × 11,311.08
  4. Step 4: Simplify right side
    20,871.10x = 325,783,196.60
  5. Step 5: Solve for x
    x = 325,783,196.60/20,871.10
  6. Step 6: Final answer
    x = 15,609.30

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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.