Home / 28,939.64-43,434.04-20,640

Finding the Fourth Proportional to 28,939.64, 43,434.04 and 20,640

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Solution

The fourth proportional to 28,939.64, 43,434.04 and 20,640 is: 30,977.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.64 : 43,434.04 = 20,640 : x
  2. Step 2: Convert to fraction form
    28,939.64/43,434.04 = 20,640/x
  3. Step 3: Cross multiply
    28,939.64x = 43,434.04 × 20,640
  4. Step 4: Simplify right side
    28,939.64x = 896,478,585.60
  5. Step 5: Solve for x
    x = 896,478,585.60/28,939.64
  6. Step 6: Final answer
    x = 30,977.53

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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.