Home / 28,178.58-38,885.01-15,429.44

Finding the Fourth Proportional to 28,178.58, 38,885.01 and 15,429.44

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Solution

The fourth proportional to 28,178.58, 38,885.01 and 15,429.44 is: 21,291.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.58 : 38,885.01 = 15,429.44 : x
  2. Step 2: Convert to fraction form
    28,178.58/38,885.01 = 15,429.44/x
  3. Step 3: Cross multiply
    28,178.58x = 38,885.01 × 15,429.44
  4. Step 4: Simplify right side
    28,178.58x = 599,973,836.11
  5. Step 5: Solve for x
    x = 599,973,836.11/28,178.58
  6. Step 6: Final answer
    x = 21,291.84

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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.