Home / 20,510.15-30,743.35-8,661.47

Finding the Fourth Proportional to 20,510.15, 30,743.35 and 8,661.47

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Solution

The fourth proportional to 20,510.15, 30,743.35 and 8,661.47 is: 12,982.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.15 : 30,743.35 = 8,661.47 : x
  2. Step 2: Convert to fraction form
    20,510.15/30,743.35 = 8,661.47/x
  3. Step 3: Cross multiply
    20,510.15x = 30,743.35 × 8,661.47
  4. Step 4: Simplify right side
    20,510.15x = 266,282,428.35
  5. Step 5: Solve for x
    x = 266,282,428.35/20,510.15
  6. Step 6: Final answer
    x = 12,982.96

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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.