Home / 42,957.28-64,383.04-20,479.80

Finding the Fourth Proportional to 42,957.28, 64,383.04 and 20,479.80

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Solution

The fourth proportional to 42,957.28, 64,383.04 and 20,479.80 is: 30,694.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,957.28 : 64,383.04 = 20,479.80 : x
  2. Step 2: Convert to fraction form
    42,957.28/64,383.04 = 20,479.80/x
  3. Step 3: Cross multiply
    42,957.28x = 64,383.04 × 20,479.80
  4. Step 4: Simplify right side
    42,957.28x = 1,318,551,782.59
  5. Step 5: Solve for x
    x = 1,318,551,782.59/42,957.28
  6. Step 6: Final answer
    x = 30,694.49

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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.