Home / 13,787.40-20,680.78-4,427.40

Finding the Fourth Proportional to 13,787.40, 20,680.78 and 4,427.40

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Solution

The fourth proportional to 13,787.40, 20,680.78 and 4,427.40 is: 6,641.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.40 : 20,680.78 = 4,427.40 : x
  2. Step 2: Convert to fraction form
    13,787.40/20,680.78 = 4,427.40/x
  3. Step 3: Cross multiply
    13,787.40x = 20,680.78 × 4,427.40
  4. Step 4: Simplify right side
    13,787.40x = 91,562,085.37
  5. Step 5: Solve for x
    x = 91,562,085.37/13,787.40
  6. Step 6: Final answer
    x = 6,641.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.