Home / 15,492.31-21,378.96-8,418.76

Finding the Fourth Proportional to 15,492.31, 21,378.96 and 8,418.76

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Solution

The fourth proportional to 15,492.31, 21,378.96 and 8,418.76 is: 11,617.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.31 : 21,378.96 = 8,418.76 : x
  2. Step 2: Convert to fraction form
    15,492.31/21,378.96 = 8,418.76/x
  3. Step 3: Cross multiply
    15,492.31x = 21,378.96 × 8,418.76
  4. Step 4: Simplify right side
    15,492.31x = 179,984,333.29
  5. Step 5: Solve for x
    x = 179,984,333.29/15,492.31
  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.