Home / 18,828.40-28,233.24-8,438.80

Finding the Fourth Proportional to 18,828.40, 28,233.24 and 8,438.80

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Solution

The fourth proportional to 18,828.40, 28,233.24 and 8,438.80 is: 12,654.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,828.40 : 28,233.24 = 8,438.80 : x
  2. Step 2: Convert to fraction form
    18,828.40/28,233.24 = 8,438.80/x
  3. Step 3: Cross multiply
    18,828.40x = 28,233.24 × 8,438.80
  4. Step 4: Simplify right side
    18,828.40x = 238,254,665.71
  5. Step 5: Solve for x
    x = 238,254,665.71/18,828.40
  6. Step 6: Final answer
    x = 12,654.00

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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.