Home / 42,907.78-64,371.36-15,205.78

Finding the Fourth Proportional to 42,907.78, 64,371.36 and 15,205.78

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Solution

The fourth proportional to 42,907.78, 64,371.36 and 15,205.78 is: 22,812.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,907.78 : 64,371.36 = 15,205.78 : x
  2. Step 2: Convert to fraction form
    42,907.78/64,371.36 = 15,205.78/x
  3. Step 3: Cross multiply
    42,907.78x = 64,371.36 × 15,205.78
  4. Step 4: Simplify right side
    42,907.78x = 978,816,738.46
  5. Step 5: Solve for x
    x = 978,816,738.46/42,907.78
  6. Step 6: Final answer
    x = 22,812.10

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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.