Home / 15,710.23-21,680.49-8,636.80

Finding the Fourth Proportional to 15,710.23, 21,680.49 and 8,636.80

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Solution

The fourth proportional to 15,710.23, 21,680.49 and 8,636.80 is: 11,918.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.23 : 21,680.49 = 8,636.80 : x
  2. Step 2: Convert to fraction form
    15,710.23/21,680.49 = 8,636.80/x
  3. Step 3: Cross multiply
    15,710.23x = 21,680.49 × 8,636.80
  4. Step 4: Simplify right side
    15,710.23x = 187,250,056.03
  5. Step 5: Solve for x
    x = 187,250,056.03/15,710.23
  6. Step 6: Final answer
    x = 11,918.99

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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.