Home / 20,178.05-27,838.18-12,621.51

Finding the Fourth Proportional to 20,178.05, 27,838.18 and 12,621.51

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Solution

The fourth proportional to 20,178.05, 27,838.18 and 12,621.51 is: 17,412.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.05 : 27,838.18 = 12,621.51 : x
  2. Step 2: Convert to fraction form
    20,178.05/27,838.18 = 12,621.51/x
  3. Step 3: Cross multiply
    20,178.05x = 27,838.18 × 12,621.51
  4. Step 4: Simplify right side
    20,178.05x = 351,359,814.13
  5. Step 5: Solve for x
    x = 351,359,814.13/20,178.05
  6. Step 6: Final answer
    x = 17,412.97

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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.