Home / 15,707.79-21,677.90-8,634.33

Finding the Fourth Proportional to 15,707.79, 21,677.90 and 8,634.33

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Solution

The fourth proportional to 15,707.79, 21,677.90 and 8,634.33 is: 11,916.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,707.79 : 21,677.90 = 8,634.33 : x
  2. Step 2: Convert to fraction form
    15,707.79/21,677.90 = 8,634.33/x
  3. Step 3: Cross multiply
    15,707.79x = 21,677.90 × 8,634.33
  4. Step 4: Simplify right side
    15,707.79x = 187,174,099.14
  5. Step 5: Solve for x
    x = 187,174,099.14/15,707.79
  6. Step 6: Final answer
    x = 11,916.00

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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.