Home / 15,681.41-21,640.31-8,607.68

Finding the Fourth Proportional to 15,681.41, 21,640.31 and 8,607.68

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Solution

The fourth proportional to 15,681.41, 21,640.31 and 8,607.68 is: 11,878.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.41 : 21,640.31 = 8,607.68 : x
  2. Step 2: Convert to fraction form
    15,681.41/21,640.31 = 8,607.68/x
  3. Step 3: Cross multiply
    15,681.41x = 21,640.31 × 8,607.68
  4. Step 4: Simplify right side
    15,681.41x = 186,272,863.58
  5. Step 5: Solve for x
    x = 186,272,863.58/15,681.41
  6. Step 6: Final answer
    x = 11,878.58

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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.