Home / 12,457.21-17,181.23-7,981.38

Finding the Fourth Proportional to 12,457.21, 17,181.23 and 7,981.38

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Solution

The fourth proportional to 12,457.21, 17,181.23 and 7,981.38 is: 11,008.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.21 : 17,181.23 = 7,981.38 : x
  2. Step 2: Convert to fraction form
    12,457.21/17,181.23 = 7,981.38/x
  3. Step 3: Cross multiply
    12,457.21x = 17,181.23 × 7,981.38
  4. Step 4: Simplify right side
    12,457.21x = 137,129,925.50
  5. Step 5: Solve for x
    x = 137,129,925.50/12,457.21
  6. Step 6: Final answer
    x = 11,008.08

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Double scale
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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.