Home / 20,178.71-30,240.32-10,297.21

Finding the Fourth Proportional to 20,178.71, 30,240.32 and 10,297.21

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Solution

The fourth proportional to 20,178.71, 30,240.32 and 10,297.21 is: 15,431.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.71 : 30,240.32 = 10,297.21 : x
  2. Step 2: Convert to fraction form
    20,178.71/30,240.32 = 10,297.21/x
  3. Step 3: Cross multiply
    20,178.71x = 30,240.32 × 10,297.21
  4. Step 4: Simplify right side
    20,178.71x = 311,390,925.51
  5. Step 5: Solve for x
    x = 311,390,925.51/20,178.71
  6. Step 6: Final answer
    x = 15,431.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.