Home / 42,730.20-64,135.52-21,685.36

Finding the Fourth Proportional to 42,730.20, 64,135.52 and 21,685.36

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Solution

The fourth proportional to 42,730.20, 64,135.52 and 21,685.36 is: 32,548.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,730.20 : 64,135.52 = 21,685.36 : x
  2. Step 2: Convert to fraction form
    42,730.20/64,135.52 = 21,685.36/x
  3. Step 3: Cross multiply
    42,730.20x = 64,135.52 × 21,685.36
  4. Step 4: Simplify right side
    42,730.20x = 1,390,801,839.99
  5. Step 5: Solve for x
    x = 1,390,801,839.99/42,730.20
  6. Step 6: Final answer
    x = 32,548.45

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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.