Home / 15,316.05-21,137.55-8,945.73

Finding the Fourth Proportional to 15,316.05, 21,137.55 and 8,945.73

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Solution

The fourth proportional to 15,316.05, 21,137.55 and 8,945.73 is: 12,345.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.05 : 21,137.55 = 8,945.73 : x
  2. Step 2: Convert to fraction form
    15,316.05/21,137.55 = 8,945.73/x
  3. Step 3: Cross multiply
    15,316.05x = 21,137.55 × 8,945.73
  4. Step 4: Simplify right side
    15,316.05x = 189,090,815.16
  5. Step 5: Solve for x
    x = 189,090,815.16/15,316.05
  6. Step 6: Final answer
    x = 12,345.93

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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.