Home / 15,708.40-21,677.56-8,634.80

Finding the Fourth Proportional to 15,708.40, 21,677.56 and 8,634.80

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Solution

The fourth proportional to 15,708.40, 21,677.56 and 8,634.80 is: 11,916.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.40 : 21,677.56 = 8,634.80 : x
  2. Step 2: Convert to fraction form
    15,708.40/21,677.56 = 8,634.80/x
  3. Step 3: Cross multiply
    15,708.40x = 21,677.56 × 8,634.80
  4. Step 4: Simplify right side
    15,708.40x = 187,181,395.09
  5. Step 5: Solve for x
    x = 187,181,395.09/15,708.40
  6. Step 6: Final answer
    x = 11,916.01

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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.