Home / 20,885.73-31,328.51-5,090.58

Finding the Fourth Proportional to 20,885.73, 31,328.51 and 5,090.58

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Solution

The fourth proportional to 20,885.73, 31,328.51 and 5,090.58 is: 7,635.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.73 : 31,328.51 = 5,090.58 : x
  2. Step 2: Convert to fraction form
    20,885.73/31,328.51 = 5,090.58/x
  3. Step 3: Cross multiply
    20,885.73x = 31,328.51 × 5,090.58
  4. Step 4: Simplify right side
    20,885.73x = 159,480,142.52
  5. Step 5: Solve for x
    x = 159,480,142.52/20,885.73
  6. Step 6: Final answer
    x = 7,635.84

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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.