Home / 53,708.72-80,563.10-20,421.09

Finding the Fourth Proportional to 53,708.72, 80,563.10 and 20,421.09

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Solution

The fourth proportional to 53,708.72, 80,563.10 and 20,421.09 is: 30,631.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,708.72 : 80,563.10 = 20,421.09 : x
  2. Step 2: Convert to fraction form
    53,708.72/80,563.10 = 20,421.09/x
  3. Step 3: Cross multiply
    53,708.72x = 80,563.10 × 20,421.09
  4. Step 4: Simplify right side
    53,708.72x = 1,645,186,213.67
  5. Step 5: Solve for x
    x = 1,645,186,213.67/53,708.72
  6. Step 6: Final answer
    x = 30,631.64

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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.