Home / 10,421.61-15,631.20-4,181.37

Finding the Fourth Proportional to 10,421.61, 15,631.20 and 4,181.37

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Solution

The fourth proportional to 10,421.61, 15,631.20 and 4,181.37 is: 6,271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.61 : 15,631.20 = 4,181.37 : x
  2. Step 2: Convert to fraction form
    10,421.61/15,631.20 = 4,181.37/x
  3. Step 3: Cross multiply
    10,421.61x = 15,631.20 × 4,181.37
  4. Step 4: Simplify right side
    10,421.61x = 65,359,830.74
  5. Step 5: Solve for x
    x = 65,359,830.74/10,421.61
  6. Step 6: Final answer
    x = 6,271.57

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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.