Home / 30,869.28-42,600.89-18,777.92

Finding the Fourth Proportional to 30,869.28, 42,600.89 and 18,777.92

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Solution

The fourth proportional to 30,869.28, 42,600.89 and 18,777.92 is: 25,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,869.28 : 42,600.89 = 18,777.92 : x
  2. Step 2: Convert to fraction form
    30,869.28/42,600.89 = 18,777.92/x
  3. Step 3: Cross multiply
    30,869.28x = 42,600.89 × 18,777.92
  4. Step 4: Simplify right side
    30,869.28x = 799,955,797.45
  5. Step 5: Solve for x
    x = 799,955,797.45/30,869.28
  6. Step 6: Final answer
    x = 25,914.30

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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.