Home / 20,271.60-30,397.68-10,405.80

Finding the Fourth Proportional to 20,271.60, 30,397.68 and 10,405.80

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Solution

The fourth proportional to 20,271.60, 30,397.68 and 10,405.80 is: 15,603.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.60 : 30,397.68 = 10,405.80 : x
  2. Step 2: Convert to fraction form
    20,271.60/30,397.68 = 10,405.80/x
  3. Step 3: Cross multiply
    20,271.60x = 30,397.68 × 10,405.80
  4. Step 4: Simplify right side
    20,271.60x = 316,312,178.54
  5. Step 5: Solve for x
    x = 316,312,178.54/20,271.60
  6. Step 6: Final answer
    x = 15,603.71

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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.