Home / 15,530.70-21,432.82-8,457.58

Finding the Fourth Proportional to 15,530.70, 21,432.82 and 8,457.58

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Solution

The fourth proportional to 15,530.70, 21,432.82 and 8,457.58 is: 11,671.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.70 : 21,432.82 = 8,457.58 : x
  2. Step 2: Convert to fraction form
    15,530.70/21,432.82 = 8,457.58/x
  3. Step 3: Cross multiply
    15,530.70x = 21,432.82 × 8,457.58
  4. Step 4: Simplify right side
    15,530.70x = 181,269,811.28
  5. Step 5: Solve for x
    x = 181,269,811.28/15,530.70
  6. Step 6: Final answer
    x = 11,671.71

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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.