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Finding the Fourth Proportional to 13,700.56, 20,549.76 and 13,331.20

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Solution

The fourth proportional to 13,700.56, 20,549.76 and 13,331.20 is: 19,995.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.56 : 20,549.76 = 13,331.20 : x
  2. Step 2: Convert to fraction form
    13,700.56/20,549.76 = 13,331.20/x
  3. Step 3: Cross multiply
    13,700.56x = 20,549.76 × 13,331.20
  4. Step 4: Simplify right side
    13,700.56x = 273,952,960.51
  5. Step 5: Solve for x
    x = 273,952,960.51/13,700.56
  6. Step 6: Final answer
    x = 19,995.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.