Home / 12,887.02-17,783.17-7,220.80

Finding the Fourth Proportional to 12,887.02, 17,783.17 and 7,220.80

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Solution

The fourth proportional to 12,887.02, 17,783.17 and 7,220.80 is: 9,964.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.02 : 17,783.17 = 7,220.80 : x
  2. Step 2: Convert to fraction form
    12,887.02/17,783.17 = 7,220.80/x
  3. Step 3: Cross multiply
    12,887.02x = 17,783.17 × 7,220.80
  4. Step 4: Simplify right side
    12,887.02x = 128,408,713.94
  5. Step 5: Solve for x
    x = 128,408,713.94/12,887.02
  6. Step 6: Final answer
    x = 9,964.19

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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.