Home / 20,427.90-28,191.51-11,474.94

Finding the Fourth Proportional to 20,427.90, 28,191.51 and 11,474.94

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Solution

The fourth proportional to 20,427.90, 28,191.51 and 11,474.94 is: 15,835.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.90 : 28,191.51 = 11,474.94 : x
  2. Step 2: Convert to fraction form
    20,427.90/28,191.51 = 11,474.94/x
  3. Step 3: Cross multiply
    20,427.90x = 28,191.51 × 11,474.94
  4. Step 4: Simplify right side
    20,427.90x = 323,495,885.76
  5. Step 5: Solve for x
    x = 323,495,885.76/20,427.90
  6. Step 6: Final answer
    x = 15,835.98

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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.