Home / 15,406.80-21,261.34-8,692.40

Finding the Fourth Proportional to 15,406.80, 21,261.34 and 8,692.40

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Solution

The fourth proportional to 15,406.80, 21,261.34 and 8,692.40 is: 11,995.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,406.80 : 21,261.34 = 8,692.40 : x
  2. Step 2: Convert to fraction form
    15,406.80/21,261.34 = 8,692.40/x
  3. Step 3: Cross multiply
    15,406.80x = 21,261.34 × 8,692.40
  4. Step 4: Simplify right side
    15,406.80x = 184,812,071.82
  5. Step 5: Solve for x
    x = 184,812,071.82/15,406.80
  6. Step 6: Final answer
    x = 11,995.49

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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.