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Finding the Fourth Proportional to 20,866.01, 28,795.03 and 11,434.50

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Solution

The fourth proportional to 20,866.01, 28,795.03 and 11,434.50 is: 15,779.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.01 : 28,795.03 = 11,434.50 : x
  2. Step 2: Convert to fraction form
    20,866.01/28,795.03 = 11,434.50/x
  3. Step 3: Cross multiply
    20,866.01x = 28,795.03 × 11,434.50
  4. Step 4: Simplify right side
    20,866.01x = 329,256,741.95
  5. Step 5: Solve for x
    x = 329,256,741.95/20,866.01
  6. Step 6: Final answer
    x = 15,779.58

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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.