Home / 28,384.42-39,172.29-15,809.14

Finding the Fourth Proportional to 28,384.42, 39,172.29 and 15,809.14

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Solution

The fourth proportional to 28,384.42, 39,172.29 and 15,809.14 is: 21,817.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.42 : 39,172.29 = 15,809.14 : x
  2. Step 2: Convert to fraction form
    28,384.42/39,172.29 = 15,809.14/x
  3. Step 3: Cross multiply
    28,384.42x = 39,172.29 × 15,809.14
  4. Step 4: Simplify right side
    28,384.42x = 619,280,216.73
  5. Step 5: Solve for x
    x = 619,280,216.73/28,384.42
  6. Step 6: Final answer
    x = 21,817.61

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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.