Home / 53,709.34-80,564.04-20,421.72

Finding the Fourth Proportional to 53,709.34, 80,564.04 and 20,421.72

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Solution

The fourth proportional to 53,709.34, 80,564.04 and 20,421.72 is: 30,632.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,709.34 : 80,564.04 = 20,421.72 : x
  2. Step 2: Convert to fraction form
    53,709.34/80,564.04 = 20,421.72/x
  3. Step 3: Cross multiply
    53,709.34x = 80,564.04 × 20,421.72
  4. Step 4: Simplify right side
    53,709.34x = 1,645,256,266.95
  5. Step 5: Solve for x
    x = 1,645,256,266.95/53,709.34
  6. Step 6: Final answer
    x = 30,632.59

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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.