Home / 15,588.74-21,513.04-8,515.21

Finding the Fourth Proportional to 15,588.74, 21,513.04 and 8,515.21

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Solution

The fourth proportional to 15,588.74, 21,513.04 and 8,515.21 is: 11,751.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,588.74 : 21,513.04 = 8,515.21 : x
  2. Step 2: Convert to fraction form
    15,588.74/21,513.04 = 8,515.21/x
  3. Step 3: Cross multiply
    15,588.74x = 21,513.04 × 8,515.21
  4. Step 4: Simplify right side
    15,588.74x = 183,188,053.34
  5. Step 5: Solve for x
    x = 183,188,053.34/15,588.74
  6. Step 6: Final answer
    x = 11,751.31

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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.