Home / 13,780.32-19,010.16-8,187.36

Finding the Fourth Proportional to 13,780.32, 19,010.16 and 8,187.36

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Solution

The fourth proportional to 13,780.32, 19,010.16 and 8,187.36 is: 11,294.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.32 : 19,010.16 = 8,187.36 : x
  2. Step 2: Convert to fraction form
    13,780.32/19,010.16 = 8,187.36/x
  3. Step 3: Cross multiply
    13,780.32x = 19,010.16 × 8,187.36
  4. Step 4: Simplify right side
    13,780.32x = 155,643,023.58
  5. Step 5: Solve for x
    x = 155,643,023.58/13,780.32
  6. Step 6: Final answer
    x = 11,294.59

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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.