Home / 30,905.76-42,650.40-18,155.76

Finding the Fourth Proportional to 30,905.76, 42,650.40 and 18,155.76

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Solution

The fourth proportional to 30,905.76, 42,650.40 and 18,155.76 is: 25,055.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,905.76 : 42,650.40 = 18,155.76 : x
  2. Step 2: Convert to fraction form
    30,905.76/42,650.40 = 18,155.76/x
  3. Step 3: Cross multiply
    30,905.76x = 42,650.40 × 18,155.76
  4. Step 4: Simplify right side
    30,905.76x = 774,350,426.30
  5. Step 5: Solve for x
    x = 774,350,426.30/30,905.76
  6. Step 6: Final answer
    x = 25,055.21

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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.