Home / 20,315.40-28,035.06-11,362.80

Finding the Fourth Proportional to 20,315.40, 28,035.06 and 11,362.80

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Solution

The fourth proportional to 20,315.40, 28,035.06 and 11,362.80 is: 15,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.40 : 28,035.06 = 11,362.80 : x
  2. Step 2: Convert to fraction form
    20,315.40/28,035.06 = 11,362.80/x
  3. Step 3: Cross multiply
    20,315.40x = 28,035.06 × 11,362.80
  4. Step 4: Simplify right side
    20,315.40x = 318,556,779.77
  5. Step 5: Solve for x
    x = 318,556,779.77/20,315.40
  6. Step 6: Final answer
    x = 15,680.56

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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.