Home / 15,619.17-21,554.20-8,905.17

Finding the Fourth Proportional to 15,619.17, 21,554.20 and 8,905.17

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Solution

The fourth proportional to 15,619.17, 21,554.20 and 8,905.17 is: 12,288.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,619.17 : 21,554.20 = 8,905.17 : x
  2. Step 2: Convert to fraction form
    15,619.17/21,554.20 = 8,905.17/x
  3. Step 3: Cross multiply
    15,619.17x = 21,554.20 × 8,905.17
  4. Step 4: Simplify right side
    15,619.17x = 191,943,815.21
  5. Step 5: Solve for x
    x = 191,943,815.21/15,619.17
  6. Step 6: Final answer
    x = 12,288.99

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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.