Home / 13,787.85-20,690.28-6,390.93

Finding the Fourth Proportional to 13,787.85, 20,690.28 and 6,390.93

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Solution

The fourth proportional to 13,787.85, 20,690.28 and 6,390.93 is: 9,590.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.85 : 20,690.28 = 6,390.93 : x
  2. Step 2: Convert to fraction form
    13,787.85/20,690.28 = 6,390.93/x
  3. Step 3: Cross multiply
    13,787.85x = 20,690.28 × 6,390.93
  4. Step 4: Simplify right side
    13,787.85x = 132,230,131.16
  5. Step 5: Solve for x
    x = 132,230,131.16/13,787.85
  6. Step 6: Final answer
    x = 9,590.34

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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.