Home / 7,421.40-10,240.80-4,234.86

Finding the Fourth Proportional to 7,421.40, 10,240.80 and 4,234.86

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Solution

The fourth proportional to 7,421.40, 10,240.80 and 4,234.86 is: 5,843.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.40 : 10,240.80 = 4,234.86 : x
  2. Step 2: Convert to fraction form
    7,421.40/10,240.80 = 4,234.86/x
  3. Step 3: Cross multiply
    7,421.40x = 10,240.80 × 4,234.86
  4. Step 4: Simplify right side
    7,421.40x = 43,368,354.29
  5. Step 5: Solve for x
    x = 43,368,354.29/7,421.40
  6. Step 6: Final answer
    x = 5,843.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.