Home / 15,486.17-21,371.40-8,771.63

Finding the Fourth Proportional to 15,486.17, 21,371.40 and 8,771.63

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Solution

The fourth proportional to 15,486.17, 21,371.40 and 8,771.63 is: 12,105.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.17 : 21,371.40 = 8,771.63 : x
  2. Step 2: Convert to fraction form
    15,486.17/21,371.40 = 8,771.63/x
  3. Step 3: Cross multiply
    15,486.17x = 21,371.40 × 8,771.63
  4. Step 4: Simplify right side
    15,486.17x = 187,461,906.53
  5. Step 5: Solve for x
    x = 187,461,906.53/15,486.17
  6. Step 6: Final answer
    x = 12,105.12

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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.