Home / 30,921.28-42,664.80-18,350.08

Finding the Fourth Proportional to 30,921.28, 42,664.80 and 18,350.08

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Solution

The fourth proportional to 30,921.28, 42,664.80 and 18,350.08 is: 25,319.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,921.28 : 42,664.80 = 18,350.08 : x
  2. Step 2: Convert to fraction form
    30,921.28/42,664.80 = 18,350.08/x
  3. Step 3: Cross multiply
    30,921.28x = 42,664.80 × 18,350.08
  4. Step 4: Simplify right side
    30,921.28x = 782,902,493.18
  5. Step 5: Solve for x
    x = 782,902,493.18/30,921.28
  6. Step 6: Final answer
    x = 25,319.21

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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.