Home / 28,402.12-39,188.64-18,964

Finding the Fourth Proportional to 28,402.12, 39,188.64 and 18,964

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Solution

The fourth proportional to 28,402.12, 39,188.64 and 18,964 is: 26,166.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,402.12 : 39,188.64 = 18,964 : x
  2. Step 2: Convert to fraction form
    28,402.12/39,188.64 = 18,964/x
  3. Step 3: Cross multiply
    28,402.12x = 39,188.64 × 18,964
  4. Step 4: Simplify right side
    28,402.12x = 743,173,368.96
  5. Step 5: Solve for x
    x = 743,173,368.96/28,402.12
  6. Step 6: Final answer
    x = 26,166.12

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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.