Home / 15,721.92-21,692.70-9,353.22

Finding the Fourth Proportional to 15,721.92, 21,692.70 and 9,353.22

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Solution

The fourth proportional to 15,721.92, 21,692.70 and 9,353.22 is: 12,905.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.92 : 21,692.70 = 9,353.22 : x
  2. Step 2: Convert to fraction form
    15,721.92/21,692.70 = 9,353.22/x
  3. Step 3: Cross multiply
    15,721.92x = 21,692.70 × 9,353.22
  4. Step 4: Simplify right side
    15,721.92x = 202,896,595.49
  5. Step 5: Solve for x
    x = 202,896,595.49/15,721.92
  6. Step 6: Final answer
    x = 12,905.33

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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.