Home / 20,670.31-28,525.40-11,238.94

Finding the Fourth Proportional to 20,670.31, 28,525.40 and 11,238.94

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Solution

The fourth proportional to 20,670.31, 28,525.40 and 11,238.94 is: 15,509.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.31 : 28,525.40 = 11,238.94 : x
  2. Step 2: Convert to fraction form
    20,670.31/28,525.40 = 11,238.94/x
  3. Step 3: Cross multiply
    20,670.31x = 28,525.40 × 11,238.94
  4. Step 4: Simplify right side
    20,670.31x = 320,595,259.08
  5. Step 5: Solve for x
    x = 320,595,259.08/20,670.31
  6. Step 6: Final answer
    x = 15,509.94

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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.