Home / 7,887.09-11,780.35-7,135.45

Finding the Fourth Proportional to 7,887.09, 11,780.35 and 7,135.45

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Solution

The fourth proportional to 7,887.09, 11,780.35 and 7,135.45 is: 10,657.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.09 : 11,780.35 = 7,135.45 : x
  2. Step 2: Convert to fraction form
    7,887.09/11,780.35 = 7,135.45/x
  3. Step 3: Cross multiply
    7,887.09x = 11,780.35 × 7,135.45
  4. Step 4: Simplify right side
    7,887.09x = 84,058,098.41
  5. Step 5: Solve for x
    x = 84,058,098.41/7,887.09
  6. Step 6: Final answer
    x = 10,657.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.