Home / 12,457.28-17,181.32-7,981.45

Finding the Fourth Proportional to 12,457.28, 17,181.32 and 7,981.45

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Solution

The fourth proportional to 12,457.28, 17,181.32 and 7,981.45 is: 11,008.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.28 : 17,181.32 = 7,981.45 : x
  2. Step 2: Convert to fraction form
    12,457.28/17,181.32 = 7,981.45/x
  3. Step 3: Cross multiply
    12,457.28x = 17,181.32 × 7,981.45
  4. Step 4: Simplify right side
    12,457.28x = 137,131,720.70
  5. Step 5: Solve for x
    x = 137,131,720.70/12,457.28
  6. Step 6: Final answer
    x = 11,008.16

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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.