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Finding the Fourth Proportional to 13,899.16, 20,841.90 and 4,658.68

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Solution

The fourth proportional to 13,899.16, 20,841.90 and 4,658.68 is: 6,985.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,899.16 : 20,841.90 = 4,658.68 : x
  2. Step 2: Convert to fraction form
    13,899.16/20,841.90 = 4,658.68/x
  3. Step 3: Cross multiply
    13,899.16x = 20,841.90 × 4,658.68
  4. Step 4: Simplify right side
    13,899.16x = 97,095,742.69
  5. Step 5: Solve for x
    x = 97,095,742.69/13,899.16
  6. Step 6: Final answer
    x = 6,985.73

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1.5x scale

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.