Home / 30,878.24-42,614.08-18,783.45

Finding the Fourth Proportional to 30,878.24, 42,614.08 and 18,783.45

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Solution

The fourth proportional to 30,878.24, 42,614.08 and 18,783.45 is: 25,922.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,878.24 : 42,614.08 = 18,783.45 : x
  2. Step 2: Convert to fraction form
    30,878.24/42,614.08 = 18,783.45/x
  3. Step 3: Cross multiply
    30,878.24x = 42,614.08 × 18,783.45
  4. Step 4: Simplify right side
    30,878.24x = 800,439,394.02
  5. Step 5: Solve for x
    x = 800,439,394.02/30,878.24
  6. Step 6: Final answer
    x = 25,922.45

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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.