Home / 22,721.60-31,361.68-20,359.68

Finding the Fourth Proportional to 22,721.60, 31,361.68 and 20,359.68

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Solution

The fourth proportional to 22,721.60, 31,361.68 and 20,359.68 is: 28,101.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,721.60 : 31,361.68 = 20,359.68 : x
  2. Step 2: Convert to fraction form
    22,721.60/31,361.68 = 20,359.68/x
  3. Step 3: Cross multiply
    22,721.60x = 31,361.68 × 20,359.68
  4. Step 4: Simplify right side
    22,721.60x = 638,513,769.06
  5. Step 5: Solve for x
    x = 638,513,769.06/22,721.60
  6. Step 6: Final answer
    x = 28,101.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.