Home / 53,680.15-80,534.15-20,400.79

Finding the Fourth Proportional to 53,680.15, 80,534.15 and 20,400.79

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Solution

The fourth proportional to 53,680.15, 80,534.15 and 20,400.79 is: 30,606.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,680.15 : 80,534.15 = 20,400.79 : x
  2. Step 2: Convert to fraction form
    53,680.15/80,534.15 = 20,400.79/x
  3. Step 3: Cross multiply
    53,680.15x = 80,534.15 × 20,400.79
  4. Step 4: Simplify right side
    53,680.15x = 1,642,960,281.98
  5. Step 5: Solve for x
    x = 1,642,960,281.98/53,680.15
  6. Step 6: Final answer
    x = 30,606.48

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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.