Home / 21,580.37-29,780.45-12,020.23

Finding the Fourth Proportional to 21,580.37, 29,780.45 and 12,020.23

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Solution

The fourth proportional to 21,580.37, 29,780.45 and 12,020.23 is: 16,587.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.37 : 29,780.45 = 12,020.23 : x
  2. Step 2: Convert to fraction form
    21,580.37/29,780.45 = 12,020.23/x
  3. Step 3: Cross multiply
    21,580.37x = 29,780.45 × 12,020.23
  4. Step 4: Simplify right side
    21,580.37x = 357,967,858.50
  5. Step 5: Solve for x
    x = 357,967,858.50/21,580.37
  6. Step 6: Final answer
    x = 16,587.66

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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.