Home / 15,848.72-21,871.57-8,678.94

Finding the Fourth Proportional to 15,848.72, 21,871.57 and 8,678.94

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Solution

The fourth proportional to 15,848.72, 21,871.57 and 8,678.94 is: 11,977.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,848.72 : 21,871.57 = 8,678.94 : x
  2. Step 2: Convert to fraction form
    15,848.72/21,871.57 = 8,678.94/x
  3. Step 3: Cross multiply
    15,848.72x = 21,871.57 × 8,678.94
  4. Step 4: Simplify right side
    15,848.72x = 189,822,043.74
  5. Step 5: Solve for x
    x = 189,822,043.74/15,848.72
  6. Step 6: Final answer
    x = 11,977.12

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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.