Home / 13,781.09-19,017.86-8,403.53

Finding the Fourth Proportional to 13,781.09, 19,017.86 and 8,403.53

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Solution

The fourth proportional to 13,781.09, 19,017.86 and 8,403.53 is: 11,596.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.09 : 19,017.86 = 8,403.53 : x
  2. Step 2: Convert to fraction form
    13,781.09/19,017.86 = 8,403.53/x
  3. Step 3: Cross multiply
    13,781.09x = 19,017.86 × 8,403.53
  4. Step 4: Simplify right side
    13,781.09x = 159,817,019.94
  5. Step 5: Solve for x
    x = 159,817,019.94/13,781.09
  6. Step 6: Final answer
    x = 11,596.84

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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.