Home / 20,768.40-28,661.04-12,810.96

Finding the Fourth Proportional to 20,768.40, 28,661.04 and 12,810.96

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Solution

The fourth proportional to 20,768.40, 28,661.04 and 12,810.96 is: 17,679.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.40 : 28,661.04 = 12,810.96 : x
  2. Step 2: Convert to fraction form
    20,768.40/28,661.04 = 12,810.96/x
  3. Step 3: Cross multiply
    20,768.40x = 28,661.04 × 12,810.96
  4. Step 4: Simplify right side
    20,768.40x = 367,175,437.00
  5. Step 5: Solve for x
    x = 367,175,437.00/20,768.40
  6. Step 6: Final answer
    x = 17,679.52

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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.