Home / 20,681.13-28,537.64-12,182.70

Finding the Fourth Proportional to 20,681.13, 28,537.64 and 12,182.70

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Solution

The fourth proportional to 20,681.13, 28,537.64 and 12,182.70 is: 16,810.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.13 : 28,537.64 = 12,182.70 : x
  2. Step 2: Convert to fraction form
    20,681.13/28,537.64 = 12,182.70/x
  3. Step 3: Cross multiply
    20,681.13x = 28,537.64 × 12,182.70
  4. Step 4: Simplify right side
    20,681.13x = 347,665,632.88
  5. Step 5: Solve for x
    x = 347,665,632.88/20,681.13
  6. Step 6: Final answer
    x = 16,810.77

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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.