Home / 30,783.61-42,471.39-18,834.49

Finding the Fourth Proportional to 30,783.61, 42,471.39 and 18,834.49

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Solution

The fourth proportional to 30,783.61, 42,471.39 and 18,834.49 is: 25,985.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,783.61 : 42,471.39 = 18,834.49 : x
  2. Step 2: Convert to fraction form
    30,783.61/42,471.39 = 18,834.49/x
  3. Step 3: Cross multiply
    30,783.61x = 42,471.39 × 18,834.49
  4. Step 4: Simplify right side
    30,783.61x = 799,926,970.24
  5. Step 5: Solve for x
    x = 799,926,970.24/30,783.61
  6. Step 6: Final answer
    x = 25,985.48

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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.