Home / 20,925.65-31,361.79-9,807.85

Finding the Fourth Proportional to 20,925.65, 31,361.79 and 9,807.85

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Solution

The fourth proportional to 20,925.65, 31,361.79 and 9,807.85 is: 14,699.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.65 : 31,361.79 = 9,807.85 : x
  2. Step 2: Convert to fraction form
    20,925.65/31,361.79 = 9,807.85/x
  3. Step 3: Cross multiply
    20,925.65x = 31,361.79 × 9,807.85
  4. Step 4: Simplify right side
    20,925.65x = 307,591,616.87
  5. Step 5: Solve for x
    x = 307,591,616.87/20,925.65
  6. Step 6: Final answer
    x = 14,699.26

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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.