Home / 13,855.02-19,118.79-7,805.76

Finding the Fourth Proportional to 13,855.02, 19,118.79 and 7,805.76

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Solution

The fourth proportional to 13,855.02, 19,118.79 and 7,805.76 is: 10,771.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.02 : 19,118.79 = 7,805.76 : x
  2. Step 2: Convert to fraction form
    13,855.02/19,118.79 = 7,805.76/x
  3. Step 3: Cross multiply
    13,855.02x = 19,118.79 × 7,805.76
  4. Step 4: Simplify right side
    13,855.02x = 149,236,686.23
  5. Step 5: Solve for x
    x = 149,236,686.23/13,855.02
  6. Step 6: Final answer
    x = 10,771.31

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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.