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Finding the Fourth Proportional to 15,703.59, 21,671 and 8,630.47

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Solution

The fourth proportional to 15,703.59, 21,671 and 8,630.47 is: 11,910.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.59 : 21,671 = 8,630.47 : x
  2. Step 2: Convert to fraction form
    15,703.59/21,671 = 8,630.47/x
  3. Step 3: Cross multiply
    15,703.59x = 21,671 × 8,630.47
  4. Step 4: Simplify right side
    15,703.59x = 187,030,915.37
  5. Step 5: Solve for x
    x = 187,030,915.37/15,703.59
  6. Step 6: Final answer
    x = 11,910.07

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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.