Home / 20,930.02-31,390.16-7,788.58

Finding the Fourth Proportional to 20,930.02, 31,390.16 and 7,788.58

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Solution

The fourth proportional to 20,930.02, 31,390.16 and 7,788.58 is: 11,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.02 : 31,390.16 = 7,788.58 : x
  2. Step 2: Convert to fraction form
    20,930.02/31,390.16 = 7,788.58/x
  3. Step 3: Cross multiply
    20,930.02x = 31,390.16 × 7,788.58
  4. Step 4: Simplify right side
    20,930.02x = 244,484,772.37
  5. Step 5: Solve for x
    x = 244,484,772.37/20,930.02
  6. Step 6: Final answer
    x = 11,681.06

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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.