Home / 42,835.60-64,275.36-20,667.88

Finding the Fourth Proportional to 42,835.60, 64,275.36 and 20,667.88

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Solution

The fourth proportional to 42,835.60, 64,275.36 and 20,667.88 is: 31,012.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,835.60 : 64,275.36 = 20,667.88 : x
  2. Step 2: Convert to fraction form
    42,835.60/64,275.36 = 20,667.88/x
  3. Step 3: Cross multiply
    42,835.60x = 64,275.36 × 20,667.88
  4. Step 4: Simplify right side
    42,835.60x = 1,328,435,427.44
  5. Step 5: Solve for x
    x = 1,328,435,427.44/42,835.60
  6. Step 6: Final answer
    x = 31,012.42

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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.