Home / 21,119.81-29,152.62-12,170.88

Finding the Fourth Proportional to 21,119.81, 29,152.62 and 12,170.88

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Solution

The fourth proportional to 21,119.81, 29,152.62 and 12,170.88 is: 16,800.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.81 : 29,152.62 = 12,170.88 : x
  2. Step 2: Convert to fraction form
    21,119.81/29,152.62 = 12,170.88/x
  3. Step 3: Cross multiply
    21,119.81x = 29,152.62 × 12,170.88
  4. Step 4: Simplify right side
    21,119.81x = 354,813,039.71
  5. Step 5: Solve for x
    x = 354,813,039.71/21,119.81
  6. Step 6: Final answer
    x = 16,800.01

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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.