Home / 8,421.16-12,633.14-3,158.06

Finding the Fourth Proportional to 8,421.16, 12,633.14 and 3,158.06

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Solution

The fourth proportional to 8,421.16, 12,633.14 and 3,158.06 is: 4,737.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.16 : 12,633.14 = 3,158.06 : x
  2. Step 2: Convert to fraction form
    8,421.16/12,633.14 = 3,158.06/x
  3. Step 3: Cross multiply
    8,421.16x = 12,633.14 × 3,158.06
  4. Step 4: Simplify right side
    8,421.16x = 39,896,214.11
  5. Step 5: Solve for x
    x = 39,896,214.11/8,421.16
  6. Step 6: Final answer
    x = 4,737.62

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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.