Home / 20,928.39-31,389.09-6,888.60

Finding the Fourth Proportional to 20,928.39, 31,389.09 and 6,888.60

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Solution

The fourth proportional to 20,928.39, 31,389.09 and 6,888.60 is: 10,331.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.39 : 31,389.09 = 6,888.60 : x
  2. Step 2: Convert to fraction form
    20,928.39/31,389.09 = 6,888.60/x
  3. Step 3: Cross multiply
    20,928.39x = 31,389.09 × 6,888.60
  4. Step 4: Simplify right side
    20,928.39x = 216,226,885.37
  5. Step 5: Solve for x
    x = 216,226,885.37/20,928.39
  6. Step 6: Final answer
    x = 10,331.75

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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.