Home / 15,890.84-21,930.00-8,721.01

Finding the Fourth Proportional to 15,890.84, 21,930.00 and 8,721.01

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Solution

The fourth proportional to 15,890.84, 21,930.00 and 8,721.01 is: 12,035.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.84 : 21,930.00 = 8,721.01 : x
  2. Step 2: Convert to fraction form
    15,890.84/21,930.00 = 8,721.01/x
  3. Step 3: Cross multiply
    15,890.84x = 21,930.00 × 8,721.01
  4. Step 4: Simplify right side
    15,890.84x = 191,251,768.54
  5. Step 5: Solve for x
    x = 191,251,768.54/15,890.84
  6. Step 6: Final answer
    x = 12,035.34

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1.5x scale

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.