Home / 42,212.25-63,340.25-21,435.75

Finding the Fourth Proportional to 42,212.25, 63,340.25 and 21,435.75

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Solution

The fourth proportional to 42,212.25, 63,340.25 and 21,435.75 is: 32,164.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,212.25 : 63,340.25 = 21,435.75 : x
  2. Step 2: Convert to fraction form
    42,212.25/63,340.25 = 21,435.75/x
  3. Step 3: Cross multiply
    42,212.25x = 63,340.25 × 21,435.75
  4. Step 4: Simplify right side
    42,212.25x = 1,357,745,656.76
  5. Step 5: Solve for x
    x = 1,357,745,656.76/42,212.25
  6. Step 6: Final answer
    x = 32,164.73

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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.