Home / 21,122.86-29,156.03-12,176.33

Finding the Fourth Proportional to 21,122.86, 29,156.03 and 12,176.33

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Solution

The fourth proportional to 21,122.86, 29,156.03 and 12,176.33 is: 16,807.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.86 : 29,156.03 = 12,176.33 : x
  2. Step 2: Convert to fraction form
    21,122.86/29,156.03 = 12,176.33/x
  3. Step 3: Cross multiply
    21,122.86x = 29,156.03 × 12,176.33
  4. Step 4: Simplify right side
    21,122.86x = 355,013,381.89
  5. Step 5: Solve for x
    x = 355,013,381.89/21,122.86
  6. Step 6: Final answer
    x = 16,807.07

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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.