Home / 15,461.12-21,335.78-8,387.39

Finding the Fourth Proportional to 15,461.12, 21,335.78 and 8,387.39

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Solution

The fourth proportional to 15,461.12, 21,335.78 and 8,387.39 is: 11,574.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,461.12 : 21,335.78 = 8,387.39 : x
  2. Step 2: Convert to fraction form
    15,461.12/21,335.78 = 8,387.39/x
  3. Step 3: Cross multiply
    15,461.12x = 21,335.78 × 8,387.39
  4. Step 4: Simplify right side
    15,461.12x = 178,951,465.88
  5. Step 5: Solve for x
    x = 178,951,465.88/15,461.12
  6. Step 6: Final answer
    x = 11,574.29

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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.