Home / 21,769.28-32,628-15,159.68

Finding the Fourth Proportional to 21,769.28, 32,628 and 15,159.68

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Solution

The fourth proportional to 21,769.28, 32,628 and 15,159.68 is: 22,721.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,769.28 : 32,628 = 15,159.68 : x
  2. Step 2: Convert to fraction form
    21,769.28/32,628 = 15,159.68/x
  3. Step 3: Cross multiply
    21,769.28x = 32,628 × 15,159.68
  4. Step 4: Simplify right side
    21,769.28x = 494,630,039.04
  5. Step 5: Solve for x
    x = 494,630,039.04/21,769.28
  6. Step 6: Final answer
    x = 22,721.47

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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.