Home / 21,000.87-31,498.47-6,211.35

Finding the Fourth Proportional to 21,000.87, 31,498.47 and 6,211.35

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Solution

The fourth proportional to 21,000.87, 31,498.47 and 6,211.35 is: 9,316.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.87 : 31,498.47 = 6,211.35 : x
  2. Step 2: Convert to fraction form
    21,000.87/31,498.47 = 6,211.35/x
  3. Step 3: Cross multiply
    21,000.87x = 31,498.47 × 6,211.35
  4. Step 4: Simplify right side
    21,000.87x = 195,648,021.63
  5. Step 5: Solve for x
    x = 195,648,021.63/21,000.87
  6. Step 6: Final answer
    x = 9,316.19

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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.