Home / 30,886.62-42,605.91-18,306.78

Finding the Fourth Proportional to 30,886.62, 42,605.91 and 18,306.78

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Solution

The fourth proportional to 30,886.62, 42,605.91 and 18,306.78 is: 25,252.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,886.62 : 42,605.91 = 18,306.78 : x
  2. Step 2: Convert to fraction form
    30,886.62/42,605.91 = 18,306.78/x
  3. Step 3: Cross multiply
    30,886.62x = 42,605.91 × 18,306.78
  4. Step 4: Simplify right side
    30,886.62x = 779,977,021.07
  5. Step 5: Solve for x
    x = 779,977,021.07/30,886.62
  6. Step 6: Final answer
    x = 25,252.91

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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.