Home / 15,858.28-21,884.61-8,688.39

Finding the Fourth Proportional to 15,858.28, 21,884.61 and 8,688.39

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Solution

The fourth proportional to 15,858.28, 21,884.61 and 8,688.39 is: 11,990.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.28 : 21,884.61 = 8,688.39 : x
  2. Step 2: Convert to fraction form
    15,858.28/21,884.61 = 8,688.39/x
  3. Step 3: Cross multiply
    15,858.28x = 21,884.61 × 8,688.39
  4. Step 4: Simplify right side
    15,858.28x = 190,142,026.68
  5. Step 5: Solve for x
    x = 190,142,026.68/15,858.28
  6. Step 6: Final answer
    x = 11,990.08

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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.