Home / 42,858.40-64,280.31-11,686.36

Finding the Fourth Proportional to 42,858.40, 64,280.31 and 11,686.36

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Solution

The fourth proportional to 42,858.40, 64,280.31 and 11,686.36 is: 17,527.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,858.40 : 64,280.31 = 11,686.36 : x
  2. Step 2: Convert to fraction form
    42,858.40/64,280.31 = 11,686.36/x
  3. Step 3: Cross multiply
    42,858.40x = 64,280.31 × 11,686.36
  4. Step 4: Simplify right side
    42,858.40x = 751,202,843.57
  5. Step 5: Solve for x
    x = 751,202,843.57/42,858.40
  6. Step 6: Final answer
    x = 17,527.55

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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.