Home / 21,577.38-29,772.81-12,143.94

Finding the Fourth Proportional to 21,577.38, 29,772.81 and 12,143.94

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Solution

The fourth proportional to 21,577.38, 29,772.81 and 12,143.94 is: 16,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,577.38 : 29,772.81 = 12,143.94 : x
  2. Step 2: Convert to fraction form
    21,577.38/29,772.81 = 12,143.94/x
  3. Step 3: Cross multiply
    21,577.38x = 29,772.81 × 12,143.94
  4. Step 4: Simplify right side
    21,577.38x = 361,559,218.27
  5. Step 5: Solve for x
    x = 361,559,218.27/21,577.38
  6. Step 6: Final answer
    x = 16,756.40

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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.