Home / 8,781.51-12,119.93-5,246.81

Finding the Fourth Proportional to 8,781.51, 12,119.93 and 5,246.81

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Solution

The fourth proportional to 8,781.51, 12,119.93 and 5,246.81 is: 7,241.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.51 : 12,119.93 = 5,246.81 : x
  2. Step 2: Convert to fraction form
    8,781.51/12,119.93 = 5,246.81/x
  3. Step 3: Cross multiply
    8,781.51x = 12,119.93 × 5,246.81
  4. Step 4: Simplify right side
    8,781.51x = 63,590,883.09
  5. Step 5: Solve for x
    x = 63,590,883.09/8,781.51
  6. Step 6: Final answer
    x = 7,241.45

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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.