Home / 20,709.19-31,064.80-5,920.28

Finding the Fourth Proportional to 20,709.19, 31,064.80 and 5,920.28

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Solution

The fourth proportional to 20,709.19, 31,064.80 and 5,920.28 is: 8,880.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.19 : 31,064.80 = 5,920.28 : x
  2. Step 2: Convert to fraction form
    20,709.19/31,064.80 = 5,920.28/x
  3. Step 3: Cross multiply
    20,709.19x = 31,064.80 × 5,920.28
  4. Step 4: Simplify right side
    20,709.19x = 183,912,383.96
  5. Step 5: Solve for x
    x = 183,912,383.96/20,709.19
  6. Step 6: Final answer
    x = 8,880.72

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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.