Home / 12,788.31-19,185.08-5,392.76

Finding the Fourth Proportional to 12,788.31, 19,185.08 and 5,392.76

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Solution

The fourth proportional to 12,788.31, 19,185.08 and 5,392.76 is: 8,090.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.31 : 19,185.08 = 5,392.76 : x
  2. Step 2: Convert to fraction form
    12,788.31/19,185.08 = 5,392.76/x
  3. Step 3: Cross multiply
    12,788.31x = 19,185.08 × 5,392.76
  4. Step 4: Simplify right side
    12,788.31x = 103,460,409.13
  5. Step 5: Solve for x
    x = 103,460,409.13/12,788.31
  6. Step 6: Final answer
    x = 8,090.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.