Home / 15,657.36-21,605.40-9,692.88

Finding the Fourth Proportional to 15,657.36, 21,605.40 and 9,692.88

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Solution

The fourth proportional to 15,657.36, 21,605.40 and 9,692.88 is: 13,375.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,657.36 : 21,605.40 = 9,692.88 : x
  2. Step 2: Convert to fraction form
    15,657.36/21,605.40 = 9,692.88/x
  3. Step 3: Cross multiply
    15,657.36x = 21,605.40 × 9,692.88
  4. Step 4: Simplify right side
    15,657.36x = 209,418,549.55
  5. Step 5: Solve for x
    x = 209,418,549.55/15,657.36
  6. Step 6: Final answer
    x = 13,375.09

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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.