Home / 30,637.36-42,278.44-18,720.64

Finding the Fourth Proportional to 30,637.36, 42,278.44 and 18,720.64

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Solution

The fourth proportional to 30,637.36, 42,278.44 and 18,720.64 is: 25,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,637.36 : 42,278.44 = 18,720.64 : x
  2. Step 2: Convert to fraction form
    30,637.36/42,278.44 = 18,720.64/x
  3. Step 3: Cross multiply
    30,637.36x = 42,278.44 × 18,720.64
  4. Step 4: Simplify right side
    30,637.36x = 791,479,455.00
  5. Step 5: Solve for x
    x = 791,479,455.00/30,637.36
  6. Step 6: Final answer
    x = 25,833.80

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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.