Home / 12,281.30-18,421.50-3,516.20

Finding the Fourth Proportional to 12,281.30, 18,421.50 and 3,516.20

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Solution

The fourth proportional to 12,281.30, 18,421.50 and 3,516.20 is: 5,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.30 : 18,421.50 = 3,516.20 : x
  2. Step 2: Convert to fraction form
    12,281.30/18,421.50 = 3,516.20/x
  3. Step 3: Cross multiply
    12,281.30x = 18,421.50 × 3,516.20
  4. Step 4: Simplify right side
    12,281.30x = 64,773,678.30
  5. Step 5: Solve for x
    x = 64,773,678.30/12,281.30
  6. Step 6: Final answer
    x = 5,274.17

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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.