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Finding the Fourth Proportional to 15,765.93, 21,756.65 and 8,692.37

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Solution

The fourth proportional to 15,765.93, 21,756.65 and 8,692.37 is: 11,995.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.93 : 21,756.65 = 8,692.37 : x
  2. Step 2: Convert to fraction form
    15,765.93/21,756.65 = 8,692.37/x
  3. Step 3: Cross multiply
    15,765.93x = 21,756.65 × 8,692.37
  4. Step 4: Simplify right side
    15,765.93x = 189,116,699.52
  5. Step 5: Solve for x
    x = 189,116,699.52/15,765.93
  6. Step 6: Final answer
    x = 11,995.28

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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.