Home / 20,928.54-31,389.31-6,888.72

Finding the Fourth Proportional to 20,928.54, 31,389.31 and 6,888.72

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Solution

The fourth proportional to 20,928.54, 31,389.31 and 6,888.72 is: 10,331.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.54 : 31,389.31 = 6,888.72 : x
  2. Step 2: Convert to fraction form
    20,928.54/31,389.31 = 6,888.72/x
  3. Step 3: Cross multiply
    20,928.54x = 31,389.31 × 6,888.72
  4. Step 4: Simplify right side
    20,928.54x = 216,232,167.58
  5. Step 5: Solve for x
    x = 216,232,167.58/20,928.54
  6. Step 6: Final answer
    x = 10,331.93

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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.