Home / 15,765.86-21,756.48-8,692.16

Finding the Fourth Proportional to 15,765.86, 21,756.48 and 8,692.16

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Solution

The fourth proportional to 15,765.86, 21,756.48 and 8,692.16 is: 11,994.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.86 : 21,756.48 = 8,692.16 : x
  2. Step 2: Convert to fraction form
    15,765.86/21,756.48 = 8,692.16/x
  3. Step 3: Cross multiply
    15,765.86x = 21,756.48 × 8,692.16
  4. Step 4: Simplify right side
    15,765.86x = 189,110,805.20
  5. Step 5: Solve for x
    x = 189,110,805.20/15,765.86
  6. Step 6: Final answer
    x = 11,994.96

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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.