Home / 28,215.72-38,931.39-16,278.30

Finding the Fourth Proportional to 28,215.72, 38,931.39 and 16,278.30

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Solution

The fourth proportional to 28,215.72, 38,931.39 and 16,278.30 is: 22,460.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.72 : 38,931.39 = 16,278.30 : x
  2. Step 2: Convert to fraction form
    28,215.72/38,931.39 = 16,278.30/x
  3. Step 3: Cross multiply
    28,215.72x = 38,931.39 × 16,278.30
  4. Step 4: Simplify right side
    28,215.72x = 633,736,845.84
  5. Step 5: Solve for x
    x = 633,736,845.84/28,215.72
  6. Step 6: Final answer
    x = 22,460.42

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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.