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Finding the Fourth Proportional to 13,554.51, 18,712.01 and 8,521.51

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Solution

The fourth proportional to 13,554.51, 18,712.01 and 8,521.51 is: 11,763.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,554.51 : 18,712.01 = 8,521.51 : x
  2. Step 2: Convert to fraction form
    13,554.51/18,712.01 = 8,521.51/x
  3. Step 3: Cross multiply
    13,554.51x = 18,712.01 × 8,521.51
  4. Step 4: Simplify right side
    13,554.51x = 159,454,563.63
  5. Step 5: Solve for x
    x = 159,454,563.63/13,554.51
  6. Step 6: Final answer
    x = 11,763.95

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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.