Home / 15,681.09-21,639.96-8,607.90

Finding the Fourth Proportional to 15,681.09, 21,639.96 and 8,607.90

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Solution

The fourth proportional to 15,681.09, 21,639.96 and 8,607.90 is: 11,878.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.09 : 21,639.96 = 8,607.90 : x
  2. Step 2: Convert to fraction form
    15,681.09/21,639.96 = 8,607.90/x
  3. Step 3: Cross multiply
    15,681.09x = 21,639.96 × 8,607.90
  4. Step 4: Simplify right side
    15,681.09x = 186,274,611.68
  5. Step 5: Solve for x
    x = 186,274,611.68/15,681.09
  6. Step 6: Final answer
    x = 11,878.93

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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.