Home / 30,723.71-42,389.53-18,774.79

Finding the Fourth Proportional to 30,723.71, 42,389.53 and 18,774.79

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Solution

The fourth proportional to 30,723.71, 42,389.53 and 18,774.79 is: 25,903.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,723.71 : 42,389.53 = 18,774.79 : x
  2. Step 2: Convert to fraction form
    30,723.71/42,389.53 = 18,774.79/x
  3. Step 3: Cross multiply
    30,723.71x = 42,389.53 × 18,774.79
  4. Step 4: Simplify right side
    30,723.71x = 795,854,371.04
  5. Step 5: Solve for x
    x = 795,854,371.04/30,723.71
  6. Step 6: Final answer
    x = 25,903.59

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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.