Home / 21,027.85-29,019.36-12,078.24

Finding the Fourth Proportional to 21,027.85, 29,019.36 and 12,078.24

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Solution

The fourth proportional to 21,027.85, 29,019.36 and 12,078.24 is: 16,668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.85 : 29,019.36 = 12,078.24 : x
  2. Step 2: Convert to fraction form
    21,027.85/29,019.36 = 12,078.24/x
  3. Step 3: Cross multiply
    21,027.85x = 29,019.36 × 12,078.24
  4. Step 4: Simplify right side
    21,027.85x = 350,502,812.81
  5. Step 5: Solve for x
    x = 350,502,812.81/21,027.85
  6. Step 6: Final answer
    x = 16,668.50

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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.