Home / 21,436.78-29,582.79-12,005.35

Finding the Fourth Proportional to 21,436.78, 29,582.79 and 12,005.35

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Solution

The fourth proportional to 21,436.78, 29,582.79 and 12,005.35 is: 16,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,436.78 : 29,582.79 = 12,005.35 : x
  2. Step 2: Convert to fraction form
    21,436.78/29,582.79 = 12,005.35/x
  3. Step 3: Cross multiply
    21,436.78x = 29,582.79 × 12,005.35
  4. Step 4: Simplify right side
    21,436.78x = 355,151,747.93
  5. Step 5: Solve for x
    x = 355,151,747.93/21,436.78
  6. Step 6: Final answer
    x = 16,567.40

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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.