Home / 21,035.58-31,569.69-7,899.90

Finding the Fourth Proportional to 21,035.58, 31,569.69 and 7,899.90

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Solution

The fourth proportional to 21,035.58, 31,569.69 and 7,899.90 is: 11,855.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.58 : 31,569.69 = 7,899.90 : x
  2. Step 2: Convert to fraction form
    21,035.58/31,569.69 = 7,899.90/x
  3. Step 3: Cross multiply
    21,035.58x = 31,569.69 × 7,899.90
  4. Step 4: Simplify right side
    21,035.58x = 249,397,394.03
  5. Step 5: Solve for x
    x = 249,397,394.03/21,035.58
  6. Step 6: Final answer
    x = 11,855.98

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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.