Home / 30,749.24-42,438.69-18,651.71

Finding the Fourth Proportional to 30,749.24, 42,438.69 and 18,651.71

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Solution

The fourth proportional to 30,749.24, 42,438.69 and 18,651.71 is: 25,742.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,749.24 : 42,438.69 = 18,651.71 : x
  2. Step 2: Convert to fraction form
    30,749.24/42,438.69 = 18,651.71/x
  3. Step 3: Cross multiply
    30,749.24x = 42,438.69 × 18,651.71
  4. Step 4: Simplify right side
    30,749.24x = 791,553,926.47
  5. Step 5: Solve for x
    x = 791,553,926.47/30,749.24
  6. Step 6: Final answer
    x = 25,742.23

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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.