Home / 42,879.18-64,340.71-20,415.26

Finding the Fourth Proportional to 42,879.18, 64,340.71 and 20,415.26

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Solution

The fourth proportional to 42,879.18, 64,340.71 and 20,415.26 is: 30,633.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,879.18 : 64,340.71 = 20,415.26 : x
  2. Step 2: Convert to fraction form
    42,879.18/64,340.71 = 20,415.26/x
  3. Step 3: Cross multiply
    42,879.18x = 64,340.71 × 20,415.26
  4. Step 4: Simplify right side
    42,879.18x = 1,313,532,323.23
  5. Step 5: Solve for x
    x = 1,313,532,323.23/42,879.18
  6. Step 6: Final answer
    x = 30,633.34

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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.