Home / 20,785.50-28,683.99-11,354.07

Finding the Fourth Proportional to 20,785.50, 28,683.99 and 11,354.07

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Solution

The fourth proportional to 20,785.50, 28,683.99 and 11,354.07 is: 15,668.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.50 : 28,683.99 = 11,354.07 : x
  2. Step 2: Convert to fraction form
    20,785.50/28,683.99 = 11,354.07/x
  3. Step 3: Cross multiply
    20,785.50x = 28,683.99 × 11,354.07
  4. Step 4: Simplify right side
    20,785.50x = 325,680,030.34
  5. Step 5: Solve for x
    x = 325,680,030.34/20,785.50
  6. Step 6: Final answer
    x = 15,668.62

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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.