Home / 15,710.27-21,680.37-8,636.63

Finding the Fourth Proportional to 15,710.27, 21,680.37 and 8,636.63

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Solution

The fourth proportional to 15,710.27, 21,680.37 and 8,636.63 is: 11,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.27 : 21,680.37 = 8,636.63 : x
  2. Step 2: Convert to fraction form
    15,710.27/21,680.37 = 8,636.63/x
  3. Step 3: Cross multiply
    15,710.27x = 21,680.37 × 8,636.63
  4. Step 4: Simplify right side
    15,710.27x = 187,245,225.55
  5. Step 5: Solve for x
    x = 187,245,225.55/15,710.27
  6. Step 6: Final answer
    x = 11,918.65

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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.