Home / 30,115.72-45,162.70-10,388.36

Finding the Fourth Proportional to 30,115.72, 45,162.70 and 10,388.36

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Solution

The fourth proportional to 30,115.72, 45,162.70 and 10,388.36 is: 15,578.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,115.72 : 45,162.70 = 10,388.36 : x
  2. Step 2: Convert to fraction form
    30,115.72/45,162.70 = 10,388.36/x
  3. Step 3: Cross multiply
    30,115.72x = 45,162.70 × 10,388.36
  4. Step 4: Simplify right side
    30,115.72x = 469,166,386.17
  5. Step 5: Solve for x
    x = 469,166,386.17/30,115.72
  6. Step 6: Final answer
    x = 15,578.79

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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.