Home / 53,909.61-80,889.50-20,618.70

Finding the Fourth Proportional to 53,909.61, 80,889.50 and 20,618.70

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Solution

The fourth proportional to 53,909.61, 80,889.50 and 20,618.70 is: 30,937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,909.61 : 80,889.50 = 20,618.70 : x
  2. Step 2: Convert to fraction form
    53,909.61/80,889.50 = 20,618.70/x
  3. Step 3: Cross multiply
    53,909.61x = 80,889.50 × 20,618.70
  4. Step 4: Simplify right side
    53,909.61x = 1,667,836,333.65
  5. Step 5: Solve for x
    x = 1,667,836,333.65/53,909.61
  6. Step 6: Final answer
    x = 30,937.64

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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.