Home / 21,043.76-31,555.92-7,886.72

Finding the Fourth Proportional to 21,043.76, 31,555.92 and 7,886.72

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Solution

The fourth proportional to 21,043.76, 31,555.92 and 7,886.72 is: 11,826.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.76 : 31,555.92 = 7,886.72 : x
  2. Step 2: Convert to fraction form
    21,043.76/31,555.92 = 7,886.72/x
  3. Step 3: Cross multiply
    21,043.76x = 31,555.92 × 7,886.72
  4. Step 4: Simplify right side
    21,043.76x = 248,872,705.38
  5. Step 5: Solve for x
    x = 248,872,705.38/21,043.76
  6. Step 6: Final answer
    x = 11,826.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.