Home / 20,203.89-30,307.47-5,412.69

Finding the Fourth Proportional to 20,203.89, 30,307.47 and 5,412.69

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Solution

The fourth proportional to 20,203.89, 30,307.47 and 5,412.69 is: 8,119.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,203.89 : 30,307.47 = 5,412.69 : x
  2. Step 2: Convert to fraction form
    20,203.89/30,307.47 = 5,412.69/x
  3. Step 3: Cross multiply
    20,203.89x = 30,307.47 × 5,412.69
  4. Step 4: Simplify right side
    20,203.89x = 164,044,939.79
  5. Step 5: Solve for x
    x = 164,044,939.79/20,203.89
  6. Step 6: Final answer
    x = 8,119.47

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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.