Home / 15,710.37-21,681.39-8,636.79

Finding the Fourth Proportional to 15,710.37, 21,681.39 and 8,636.79

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Solution

The fourth proportional to 15,710.37, 21,681.39 and 8,636.79 is: 11,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.37 : 21,681.39 = 8,636.79 : x
  2. Step 2: Convert to fraction form
    15,710.37/21,681.39 = 8,636.79/x
  3. Step 3: Cross multiply
    15,710.37x = 21,681.39 × 8,636.79
  4. Step 4: Simplify right side
    15,710.37x = 187,257,612.34
  5. Step 5: Solve for x
    x = 187,257,612.34/15,710.37
  6. Step 6: Final answer
    x = 11,919.36

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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.