Home / 30,987.49-42,758.28-18,233.09

Finding the Fourth Proportional to 30,987.49, 42,758.28 and 18,233.09

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Solution

The fourth proportional to 30,987.49, 42,758.28 and 18,233.09 is: 25,159.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.49 : 42,758.28 = 18,233.09 : x
  2. Step 2: Convert to fraction form
    30,987.49/42,758.28 = 18,233.09/x
  3. Step 3: Cross multiply
    30,987.49x = 42,758.28 × 18,233.09
  4. Step 4: Simplify right side
    30,987.49x = 779,615,567.49
  5. Step 5: Solve for x
    x = 779,615,567.49/30,987.49
  6. Step 6: Final answer
    x = 25,159.04

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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.