Home / 20,957.20-31,435.67-8,477.06

Finding the Fourth Proportional to 20,957.20, 31,435.67 and 8,477.06

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Solution

The fourth proportional to 20,957.20, 31,435.67 and 8,477.06 is: 12,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.20 : 31,435.67 = 8,477.06 : x
  2. Step 2: Convert to fraction form
    20,957.20/31,435.67 = 8,477.06/x
  3. Step 3: Cross multiply
    20,957.20x = 31,435.67 × 8,477.06
  4. Step 4: Simplify right side
    20,957.20x = 266,481,924.74
  5. Step 5: Solve for x
    x = 266,481,924.74/20,957.20
  6. Step 6: Final answer
    x = 12,715.53

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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.