Home / 30,972.47-42,748.22-18,394.79

Finding the Fourth Proportional to 30,972.47, 42,748.22 and 18,394.79

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Solution

The fourth proportional to 30,972.47, 42,748.22 and 18,394.79 is: 25,388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.47 : 42,748.22 = 18,394.79 : x
  2. Step 2: Convert to fraction form
    30,972.47/42,748.22 = 18,394.79/x
  3. Step 3: Cross multiply
    30,972.47x = 42,748.22 × 18,394.79
  4. Step 4: Simplify right side
    30,972.47x = 786,344,362.02
  5. Step 5: Solve for x
    x = 786,344,362.02/30,972.47
  6. Step 6: Final answer
    x = 25,388.50

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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.