Home / 20,942.48-31,411.56-13,127.60

Finding the Fourth Proportional to 20,942.48, 31,411.56 and 13,127.60

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Solution

The fourth proportional to 20,942.48, 31,411.56 and 13,127.60 is: 19,690.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.48 : 31,411.56 = 13,127.60 : x
  2. Step 2: Convert to fraction form
    20,942.48/31,411.56 = 13,127.60/x
  3. Step 3: Cross multiply
    20,942.48x = 31,411.56 × 13,127.60
  4. Step 4: Simplify right side
    20,942.48x = 412,358,395.06
  5. Step 5: Solve for x
    x = 412,358,395.06/20,942.48
  6. Step 6: Final answer
    x = 19,690.05

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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.