Home / 15,492.15-21,378.92-8,418.69

Finding the Fourth Proportional to 15,492.15, 21,378.92 and 8,418.69

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Solution

The fourth proportional to 15,492.15, 21,378.92 and 8,418.69 is: 11,617.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.15 : 21,378.92 = 8,418.69 : x
  2. Step 2: Convert to fraction form
    15,492.15/21,378.92 = 8,418.69/x
  3. Step 3: Cross multiply
    15,492.15x = 21,378.92 × 8,418.69
  4. Step 4: Simplify right side
    15,492.15x = 179,982,457.92
  5. Step 5: Solve for x
    x = 179,982,457.92/15,492.15
  6. Step 6: Final answer
    x = 11,617.66

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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.