Home / 20,681.34-28,543.19-11,731.07

Finding the Fourth Proportional to 20,681.34, 28,543.19 and 11,731.07

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Solution

The fourth proportional to 20,681.34, 28,543.19 and 11,731.07 is: 16,190.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.34 : 28,543.19 = 11,731.07 : x
  2. Step 2: Convert to fraction form
    20,681.34/28,543.19 = 11,731.07/x
  3. Step 3: Cross multiply
    20,681.34x = 28,543.19 × 11,731.07
  4. Step 4: Simplify right side
    20,681.34x = 334,841,958.54
  5. Step 5: Solve for x
    x = 334,841,958.54/20,681.34
  6. Step 6: Final answer
    x = 16,190.53

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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.