Home / 20,868.40-31,307.47-6,828.37

Finding the Fourth Proportional to 20,868.40, 31,307.47 and 6,828.37

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Solution

The fourth proportional to 20,868.40, 31,307.47 and 6,828.37 is: 10,244.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.40 : 31,307.47 = 6,828.37 : x
  2. Step 2: Convert to fraction form
    20,868.40/31,307.47 = 6,828.37/x
  3. Step 3: Cross multiply
    20,868.40x = 31,307.47 × 6,828.37
  4. Step 4: Simplify right side
    20,868.40x = 213,778,988.92
  5. Step 5: Solve for x
    x = 213,778,988.92/20,868.40
  6. Step 6: Final answer
    x = 10,244.15

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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.