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Finding the Fourth Proportional to 15,588.54, 21,513.06 and 8,515.08

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Solution

The fourth proportional to 15,588.54, 21,513.06 and 8,515.08 is: 11,751.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,588.54 : 21,513.06 = 8,515.08 : x
  2. Step 2: Convert to fraction form
    15,588.54/21,513.06 = 8,515.08/x
  3. Step 3: Cross multiply
    15,588.54x = 21,513.06 × 8,515.08
  4. Step 4: Simplify right side
    15,588.54x = 183,185,426.94
  5. Step 5: Solve for x
    x = 183,185,426.94/15,588.54
  6. Step 6: Final answer
    x = 11,751.29

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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.