Home / 42,963.28-64,392.04-20,485.80

Finding the Fourth Proportional to 42,963.28, 64,392.04 and 20,485.80

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Solution

The fourth proportional to 42,963.28, 64,392.04 and 20,485.80 is: 30,703.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,963.28 : 64,392.04 = 20,485.80 : x
  2. Step 2: Convert to fraction form
    42,963.28/64,392.04 = 20,485.80/x
  3. Step 3: Cross multiply
    42,963.28x = 64,392.04 × 20,485.80
  4. Step 4: Simplify right side
    42,963.28x = 1,319,122,453.03
  5. Step 5: Solve for x
    x = 1,319,122,453.03/42,963.28
  6. Step 6: Final answer
    x = 30,703.49

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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.