Home / 15,858.64-21,884.58-8,688.62

Finding the Fourth Proportional to 15,858.64, 21,884.58 and 8,688.62

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Solution

The fourth proportional to 15,858.64, 21,884.58 and 8,688.62 is: 11,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.64 : 21,884.58 = 8,688.62 : x
  2. Step 2: Convert to fraction form
    15,858.64/21,884.58 = 8,688.62/x
  3. Step 3: Cross multiply
    15,858.64x = 21,884.58 × 8,688.62
  4. Step 4: Simplify right side
    15,858.64x = 190,146,731.09
  5. Step 5: Solve for x
    x = 190,146,731.09/15,858.64
  6. Step 6: Final answer
    x = 11,990.11

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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.