Home / 28,932.12-39,885.21-20,407.68

Finding the Fourth Proportional to 28,932.12, 39,885.21 and 20,407.68

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Solution

The fourth proportional to 28,932.12, 39,885.21 and 20,407.68 is: 28,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,932.12 : 39,885.21 = 20,407.68 : x
  2. Step 2: Convert to fraction form
    28,932.12/39,885.21 = 20,407.68/x
  3. Step 3: Cross multiply
    28,932.12x = 39,885.21 × 20,407.68
  4. Step 4: Simplify right side
    28,932.12x = 813,964,602.41
  5. Step 5: Solve for x
    x = 813,964,602.41/28,932.12
  6. Step 6: Final answer
    x = 28,133.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.