Home / 15,316.40-21,137.68-8,942.56

Finding the Fourth Proportional to 15,316.40, 21,137.68 and 8,942.56

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Solution

The fourth proportional to 15,316.40, 21,137.68 and 8,942.56 is: 12,341.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.40 : 21,137.68 = 8,942.56 : x
  2. Step 2: Convert to fraction form
    15,316.40/21,137.68 = 8,942.56/x
  3. Step 3: Cross multiply
    15,316.40x = 21,137.68 × 8,942.56
  4. Step 4: Simplify right side
    15,316.40x = 189,024,971.66
  5. Step 5: Solve for x
    x = 189,024,971.66/15,316.40
  6. Step 6: Final answer
    x = 12,341.34

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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.