Home / 20,683.19-28,543.30-11,731.30

Finding the Fourth Proportional to 20,683.19, 28,543.30 and 11,731.30

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Solution

The fourth proportional to 20,683.19, 28,543.30 and 11,731.30 is: 16,189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.19 : 28,543.30 = 11,731.30 : x
  2. Step 2: Convert to fraction form
    20,683.19/28,543.30 = 11,731.30/x
  3. Step 3: Cross multiply
    20,683.19x = 28,543.30 × 11,731.30
  4. Step 4: Simplify right side
    20,683.19x = 334,849,914.60
  5. Step 5: Solve for x
    x = 334,849,914.60/20,683.19
  6. Step 6: Final answer
    x = 16,189.47

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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.