Home / 28,253.34-38,989.62-15,678.09

Finding the Fourth Proportional to 28,253.34, 38,989.62 and 15,678.09

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Solution

The fourth proportional to 28,253.34, 38,989.62 and 15,678.09 is: 21,635.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.34 : 38,989.62 = 15,678.09 : x
  2. Step 2: Convert to fraction form
    28,253.34/38,989.62 = 15,678.09/x
  3. Step 3: Cross multiply
    28,253.34x = 38,989.62 × 15,678.09
  4. Step 4: Simplify right side
    28,253.34x = 611,282,771.43
  5. Step 5: Solve for x
    x = 611,282,771.43/28,253.34
  6. Step 6: Final answer
    x = 21,635.77

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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.