Home / 13,125.52-19,678.56-7,930.20

Finding the Fourth Proportional to 13,125.52, 19,678.56 and 7,930.20

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Solution

The fourth proportional to 13,125.52, 19,678.56 and 7,930.20 is: 11,889.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.52 : 19,678.56 = 7,930.20 : x
  2. Step 2: Convert to fraction form
    13,125.52/19,678.56 = 7,930.20/x
  3. Step 3: Cross multiply
    13,125.52x = 19,678.56 × 7,930.20
  4. Step 4: Simplify right side
    13,125.52x = 156,054,916.51
  5. Step 5: Solve for x
    x = 156,054,916.51/13,125.52
  6. Step 6: Final answer
    x = 11,889.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.