Home / 13,615.81-20,423.73-4,255.88

Finding the Fourth Proportional to 13,615.81, 20,423.73 and 4,255.88

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Solution

The fourth proportional to 13,615.81, 20,423.73 and 4,255.88 is: 6,383.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.81 : 20,423.73 = 4,255.88 : x
  2. Step 2: Convert to fraction form
    13,615.81/20,423.73 = 4,255.88/x
  3. Step 3: Cross multiply
    13,615.81x = 20,423.73 × 4,255.88
  4. Step 4: Simplify right side
    13,615.81x = 86,920,841.91
  5. Step 5: Solve for x
    x = 86,920,841.91/13,615.81
  6. Step 6: Final answer
    x = 6,383.82

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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.