Home / 21,027.40-29,019.18-12,077.80

Finding the Fourth Proportional to 21,027.40, 29,019.18 and 12,077.80

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Solution

The fourth proportional to 21,027.40, 29,019.18 and 12,077.80 is: 16,668.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.40 : 29,019.18 = 12,077.80 : x
  2. Step 2: Convert to fraction form
    21,027.40/29,019.18 = 12,077.80/x
  3. Step 3: Cross multiply
    21,027.40x = 29,019.18 × 12,077.80
  4. Step 4: Simplify right side
    21,027.40x = 350,487,852.20
  5. Step 5: Solve for x
    x = 350,487,852.20/21,027.40
  6. Step 6: Final answer
    x = 16,668.15

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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.