Home / 20,853.90-28,787.67-13,310.19

Finding the Fourth Proportional to 20,853.90, 28,787.67 and 13,310.19

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Solution

The fourth proportional to 20,853.90, 28,787.67 and 13,310.19 is: 18,373.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.90 : 28,787.67 = 13,310.19 : x
  2. Step 2: Convert to fraction form
    20,853.90/28,787.67 = 13,310.19/x
  3. Step 3: Cross multiply
    20,853.90x = 28,787.67 × 13,310.19
  4. Step 4: Simplify right side
    20,853.90x = 383,169,357.36
  5. Step 5: Solve for x
    x = 383,169,357.36/20,853.90
  6. Step 6: Final answer
    x = 18,373.99

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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.