Home / 12,856.89-17,762.19-10,987.83

Finding the Fourth Proportional to 12,856.89, 17,762.19 and 10,987.83

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Solution

The fourth proportional to 12,856.89, 17,762.19 and 10,987.83 is: 15,180.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,856.89 : 17,762.19 = 10,987.83 : x
  2. Step 2: Convert to fraction form
    12,856.89/17,762.19 = 10,987.83/x
  3. Step 3: Cross multiply
    12,856.89x = 17,762.19 × 10,987.83
  4. Step 4: Simplify right side
    12,856.89x = 195,167,924.15
  5. Step 5: Solve for x
    x = 195,167,924.15/12,856.89
  6. Step 6: Final answer
    x = 15,180.03

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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.