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Finding the Fourth Proportional to 12,645.49, 17,459 and 11,316.91

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Solution

The fourth proportional to 12,645.49, 17,459 and 11,316.91 is: 15,624.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.49 : 17,459 = 11,316.91 : x
  2. Step 2: Convert to fraction form
    12,645.49/17,459 = 11,316.91/x
  3. Step 3: Cross multiply
    12,645.49x = 17,459 × 11,316.91
  4. Step 4: Simplify right side
    12,645.49x = 197,581,931.69
  5. Step 5: Solve for x
    x = 197,581,931.69/12,645.49
  6. Step 6: Final answer
    x = 15,624.70

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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.