Home / 42,721.60-64,089.06-20,530.84

Finding the Fourth Proportional to 42,721.60, 64,089.06 and 20,530.84

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Solution

The fourth proportional to 42,721.60, 64,089.06 and 20,530.84 is: 30,799.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,721.60 : 64,089.06 = 20,530.84 : x
  2. Step 2: Convert to fraction form
    42,721.60/64,089.06 = 20,530.84/x
  3. Step 3: Cross multiply
    42,721.60x = 64,089.06 × 20,530.84
  4. Step 4: Simplify right side
    42,721.60x = 1,315,802,236.61
  5. Step 5: Solve for x
    x = 1,315,802,236.61/42,721.60
  6. Step 6: Final answer
    x = 30,799.46

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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.