Home / 20,783.02-31,188.20-7,635.51

Finding the Fourth Proportional to 20,783.02, 31,188.20 and 7,635.51

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Solution

The fourth proportional to 20,783.02, 31,188.20 and 7,635.51 is: 11,458.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.02 : 31,188.20 = 7,635.51 : x
  2. Step 2: Convert to fraction form
    20,783.02/31,188.20 = 7,635.51/x
  3. Step 3: Cross multiply
    20,783.02x = 31,188.20 × 7,635.51
  4. Step 4: Simplify right side
    20,783.02x = 238,137,812.98
  5. Step 5: Solve for x
    x = 238,137,812.98/20,783.02
  6. Step 6: Final answer
    x = 11,458.29

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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.