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Finding the Fourth Proportional to 30,593.60, 42,218.40 and 18,019.20

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Solution

The fourth proportional to 30,593.60, 42,218.40 and 18,019.20 is: 24,866.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,593.60 : 42,218.40 = 18,019.20 : x
  2. Step 2: Convert to fraction form
    30,593.60/42,218.40 = 18,019.20/x
  3. Step 3: Cross multiply
    30,593.60x = 42,218.40 × 18,019.20
  4. Step 4: Simplify right side
    30,593.60x = 760,741,793.28
  5. Step 5: Solve for x
    x = 760,741,793.28/30,593.60
  6. Step 6: Final answer
    x = 24,866.04

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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.