Home / 28,214.40-42,307.92-8,489.28

Finding the Fourth Proportional to 28,214.40, 42,307.92 and 8,489.28

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Solution

The fourth proportional to 28,214.40, 42,307.92 and 8,489.28 is: 12,729.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,214.40 : 42,307.92 = 8,489.28 : x
  2. Step 2: Convert to fraction form
    28,214.40/42,307.92 = 8,489.28/x
  3. Step 3: Cross multiply
    28,214.40x = 42,307.92 × 8,489.28
  4. Step 4: Simplify right side
    28,214.40x = 359,163,779.10
  5. Step 5: Solve for x
    x = 359,163,779.10/28,214.40
  6. Step 6: Final answer
    x = 12,729.80

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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.