Home / 12,900.06-17,805.02-8,415.90

Finding the Fourth Proportional to 12,900.06, 17,805.02 and 8,415.90

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Solution

The fourth proportional to 12,900.06, 17,805.02 and 8,415.90 is: 11,615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.06 : 17,805.02 = 8,415.90 : x
  2. Step 2: Convert to fraction form
    12,900.06/17,805.02 = 8,415.90/x
  3. Step 3: Cross multiply
    12,900.06x = 17,805.02 × 8,415.90
  4. Step 4: Simplify right side
    12,900.06x = 149,845,225.74
  5. Step 5: Solve for x
    x = 149,845,225.74/12,900.06
  6. Step 6: Final answer
    x = 11,615.85

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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.