Home / 21,127.05-31,690.49-8,652.87

Finding the Fourth Proportional to 21,127.05, 31,690.49 and 8,652.87

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Solution

The fourth proportional to 21,127.05, 31,690.49 and 8,652.87 is: 12,979.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.05 : 31,690.49 = 8,652.87 : x
  2. Step 2: Convert to fraction form
    21,127.05/31,690.49 = 8,652.87/x
  3. Step 3: Cross multiply
    21,127.05x = 31,690.49 × 8,652.87
  4. Step 4: Simplify right side
    21,127.05x = 274,213,646.94
  5. Step 5: Solve for x
    x = 274,213,646.94/21,127.05
  6. Step 6: Final answer
    x = 12,979.27

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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.