Home / 15,776.42-21,770.96-8,971.17

Finding the Fourth Proportional to 15,776.42, 21,770.96 and 8,971.17

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Solution

The fourth proportional to 15,776.42, 21,770.96 and 8,971.17 is: 12,379.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.42 : 21,770.96 = 8,971.17 : x
  2. Step 2: Convert to fraction form
    15,776.42/21,770.96 = 8,971.17/x
  3. Step 3: Cross multiply
    15,776.42x = 21,770.96 × 8,971.17
  4. Step 4: Simplify right side
    15,776.42x = 195,310,938.37
  5. Step 5: Solve for x
    x = 195,310,938.37/15,776.42
  6. Step 6: Final answer
    x = 12,379.93

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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.