Home / 12,840.21-17,718.95-8,062.63

Finding the Fourth Proportional to 12,840.21, 17,718.95 and 8,062.63

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Solution

The fourth proportional to 12,840.21, 17,718.95 and 8,062.63 is: 11,126.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.21 : 17,718.95 = 8,062.63 : x
  2. Step 2: Convert to fraction form
    12,840.21/17,718.95 = 8,062.63/x
  3. Step 3: Cross multiply
    12,840.21x = 17,718.95 × 8,062.63
  4. Step 4: Simplify right side
    12,840.21x = 142,861,313.70
  5. Step 5: Solve for x
    x = 142,861,313.70/12,840.21
  6. Step 6: Final answer
    x = 11,126.09

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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.