Home / 53,421.23-80,143.17-20,140.49

Finding the Fourth Proportional to 53,421.23, 80,143.17 and 20,140.49

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Solution

The fourth proportional to 53,421.23, 80,143.17 and 20,140.49 is: 30,215.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,421.23 : 80,143.17 = 20,140.49 : x
  2. Step 2: Convert to fraction form
    53,421.23/80,143.17 = 20,140.49/x
  3. Step 3: Cross multiply
    53,421.23x = 80,143.17 × 20,140.49
  4. Step 4: Simplify right side
    53,421.23x = 1,614,122,313.24
  5. Step 5: Solve for x
    x = 1,614,122,313.24/53,421.23
  6. Step 6: Final answer
    x = 30,215.00

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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.