Home / 20,686.88-28,548.50-11,256.05

Finding the Fourth Proportional to 20,686.88, 28,548.50 and 11,256.05

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Solution

The fourth proportional to 20,686.88, 28,548.50 and 11,256.05 is: 15,533.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.88 : 28,548.50 = 11,256.05 : x
  2. Step 2: Convert to fraction form
    20,686.88/28,548.50 = 11,256.05/x
  3. Step 3: Cross multiply
    20,686.88x = 28,548.50 × 11,256.05
  4. Step 4: Simplify right side
    20,686.88x = 321,343,144.40
  5. Step 5: Solve for x
    x = 321,343,144.40/20,686.88
  6. Step 6: Final answer
    x = 15,533.67

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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.