Home / 20,975.16-28,945.98-11,543.79

Finding the Fourth Proportional to 20,975.16, 28,945.98 and 11,543.79

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Solution

The fourth proportional to 20,975.16, 28,945.98 and 11,543.79 is: 15,930.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.16 : 28,945.98 = 11,543.79 : x
  2. Step 2: Convert to fraction form
    20,975.16/28,945.98 = 11,543.79/x
  3. Step 3: Cross multiply
    20,975.16x = 28,945.98 × 11,543.79
  4. Step 4: Simplify right side
    20,975.16x = 334,146,314.46
  5. Step 5: Solve for x
    x = 334,146,314.46/20,975.16
  6. Step 6: Final answer
    x = 15,930.57

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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.