Home / 20,428.95-28,188.88-11,474.74

Finding the Fourth Proportional to 20,428.95, 28,188.88 and 11,474.74

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Solution

The fourth proportional to 20,428.95, 28,188.88 and 11,474.74 is: 15,833.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.95 : 28,188.88 = 11,474.74 : x
  2. Step 2: Convert to fraction form
    20,428.95/28,188.88 = 11,474.74/x
  3. Step 3: Cross multiply
    20,428.95x = 28,188.88 × 11,474.74
  4. Step 4: Simplify right side
    20,428.95x = 323,459,899.26
  5. Step 5: Solve for x
    x = 323,459,899.26/20,428.95
  6. Step 6: Final answer
    x = 15,833.41

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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.