Home / 30,159.06-45,231.30-12,642

Finding the Fourth Proportional to 30,159.06, 45,231.30 and 12,642

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Solution

The fourth proportional to 30,159.06, 45,231.30 and 12,642 is: 18,959.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,159.06 : 45,231.30 = 12,642 : x
  2. Step 2: Convert to fraction form
    30,159.06/45,231.30 = 12,642/x
  3. Step 3: Cross multiply
    30,159.06x = 45,231.30 × 12,642
  4. Step 4: Simplify right side
    30,159.06x = 571,814,094.60
  5. Step 5: Solve for x
    x = 571,814,094.60/30,159.06
  6. Step 6: Final answer
    x = 18,959.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.