Home / 20,681.48-28,541.92-11,729.76

Finding the Fourth Proportional to 20,681.48, 28,541.92 and 11,729.76

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Solution

The fourth proportional to 20,681.48, 28,541.92 and 11,729.76 is: 16,187.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.48 : 28,541.92 = 11,729.76 : x
  2. Step 2: Convert to fraction form
    20,681.48/28,541.92 = 11,729.76/x
  3. Step 3: Cross multiply
    20,681.48x = 28,541.92 × 11,729.76
  4. Step 4: Simplify right side
    20,681.48x = 334,789,871.54
  5. Step 5: Solve for x
    x = 334,789,871.54/20,681.48
  6. Step 6: Final answer
    x = 16,187.91

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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.