Home / 21,122.81-29,148.89-12,047.96

Finding the Fourth Proportional to 21,122.81, 29,148.89 and 12,047.96

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Solution

The fourth proportional to 21,122.81, 29,148.89 and 12,047.96 is: 16,625.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.81 : 29,148.89 = 12,047.96 : x
  2. Step 2: Convert to fraction form
    21,122.81/29,148.89 = 12,047.96/x
  3. Step 3: Cross multiply
    21,122.81x = 29,148.89 × 12,047.96
  4. Step 4: Simplify right side
    21,122.81x = 351,184,763.76
  5. Step 5: Solve for x
    x = 351,184,763.76/21,122.81
  6. Step 6: Final answer
    x = 16,625.86

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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.