Home / 20,870.35-31,307.45-6,830.46

Finding the Fourth Proportional to 20,870.35, 31,307.45 and 6,830.46

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Solution

The fourth proportional to 20,870.35, 31,307.45 and 6,830.46 is: 10,246.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.35 : 31,307.45 = 6,830.46 : x
  2. Step 2: Convert to fraction form
    20,870.35/31,307.45 = 6,830.46/x
  3. Step 3: Cross multiply
    20,870.35x = 31,307.45 × 6,830.46
  4. Step 4: Simplify right side
    20,870.35x = 213,844,250.77
  5. Step 5: Solve for x
    x = 213,844,250.77/20,870.35
  6. Step 6: Final answer
    x = 10,246.32

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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.