Home / 20,888.74-31,325.81-8,405.53

Finding the Fourth Proportional to 20,888.74, 31,325.81 and 8,405.53

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Solution

The fourth proportional to 20,888.74, 31,325.81 and 8,405.53 is: 12,605.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.74 : 31,325.81 = 8,405.53 : x
  2. Step 2: Convert to fraction form
    20,888.74/31,325.81 = 8,405.53/x
  3. Step 3: Cross multiply
    20,888.74x = 31,325.81 × 8,405.53
  4. Step 4: Simplify right side
    20,888.74x = 263,309,879.10
  5. Step 5: Solve for x
    x = 263,309,879.10/20,888.74
  6. Step 6: Final answer
    x = 12,605.35

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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.