Home / 20,750.78-31,127.93-8,905.07

Finding the Fourth Proportional to 20,750.78, 31,127.93 and 8,905.07

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Solution

The fourth proportional to 20,750.78, 31,127.93 and 8,905.07 is: 13,358.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.78 : 31,127.93 = 8,905.07 : x
  2. Step 2: Convert to fraction form
    20,750.78/31,127.93 = 8,905.07/x
  3. Step 3: Cross multiply
    20,750.78x = 31,127.93 × 8,905.07
  4. Step 4: Simplify right side
    20,750.78x = 277,196,195.44
  5. Step 5: Solve for x
    x = 277,196,195.44/20,750.78
  6. Step 6: Final answer
    x = 13,358.35

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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.