Home / 21,585.69-29,787.20-12,021.21

Finding the Fourth Proportional to 21,585.69, 29,787.20 and 12,021.21

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Solution

The fourth proportional to 21,585.69, 29,787.20 and 12,021.21 is: 16,588.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,585.69 : 29,787.20 = 12,021.21 : x
  2. Step 2: Convert to fraction form
    21,585.69/29,787.20 = 12,021.21/x
  3. Step 3: Cross multiply
    21,585.69x = 29,787.20 × 12,021.21
  4. Step 4: Simplify right side
    21,585.69x = 358,078,126.41
  5. Step 5: Solve for x
    x = 358,078,126.41/21,585.69
  6. Step 6: Final answer
    x = 16,588.68

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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.