Home / 20,957.85-31,457.46-15,395.58

Finding the Fourth Proportional to 20,957.85, 31,457.46 and 15,395.58

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Solution

The fourth proportional to 20,957.85, 31,457.46 and 15,395.58 is: 23,108.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.85 : 31,457.46 = 15,395.58 : x
  2. Step 2: Convert to fraction form
    20,957.85/31,457.46 = 15,395.58/x
  3. Step 3: Cross multiply
    20,957.85x = 31,457.46 × 15,395.58
  4. Step 4: Simplify right side
    20,957.85x = 484,305,842.03
  5. Step 5: Solve for x
    x = 484,305,842.03/20,957.85
  6. Step 6: Final answer
    x = 23,108.57

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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.