Home / 20,945.32-31,417.98-7,801

Finding the Fourth Proportional to 20,945.32, 31,417.98 and 7,801

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Solution

The fourth proportional to 20,945.32, 31,417.98 and 7,801 is: 11,701.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.32 : 31,417.98 = 7,801 : x
  2. Step 2: Convert to fraction form
    20,945.32/31,417.98 = 7,801/x
  3. Step 3: Cross multiply
    20,945.32x = 31,417.98 × 7,801
  4. Step 4: Simplify right side
    20,945.32x = 245,091,661.98
  5. Step 5: Solve for x
    x = 245,091,661.98/20,945.32
  6. Step 6: Final answer
    x = 11,701.50

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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.