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Finding the Fourth Proportional to 13,563.99, 18,710.13 and 8,964.79

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Solution

The fourth proportional to 13,563.99, 18,710.13 and 8,964.79 is: 12,366.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563.99 : 18,710.13 = 8,964.79 : x
  2. Step 2: Convert to fraction form
    13,563.99/18,710.13 = 8,964.79/x
  3. Step 3: Cross multiply
    13,563.99x = 18,710.13 × 8,964.79
  4. Step 4: Simplify right side
    13,563.99x = 167,732,386.32
  5. Step 5: Solve for x
    x = 167,732,386.32/13,563.99
  6. Step 6: Final answer
    x = 12,366.01

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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.