Home / 30,747.42-42,423.62-18,806.40

Finding the Fourth Proportional to 30,747.42, 42,423.62 and 18,806.40

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Solution

The fourth proportional to 30,747.42, 42,423.62 and 18,806.40 is: 25,948.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,747.42 : 42,423.62 = 18,806.40 : x
  2. Step 2: Convert to fraction form
    30,747.42/42,423.62 = 18,806.40/x
  3. Step 3: Cross multiply
    30,747.42x = 42,423.62 × 18,806.40
  4. Step 4: Simplify right side
    30,747.42x = 797,835,473.14
  5. Step 5: Solve for x
    x = 797,835,473.14/30,747.42
  6. Step 6: Final answer
    x = 25,948.05

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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.