Home / 21,470.40-29,629.80-12,036.60

Finding the Fourth Proportional to 21,470.40, 29,629.80 and 12,036.60

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Solution

The fourth proportional to 21,470.40, 29,629.80 and 12,036.60 is: 16,610.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.40 : 29,629.80 = 12,036.60 : x
  2. Step 2: Convert to fraction form
    21,470.40/29,629.80 = 12,036.60/x
  3. Step 3: Cross multiply
    21,470.40x = 29,629.80 × 12,036.60
  4. Step 4: Simplify right side
    21,470.40x = 356,642,050.68
  5. Step 5: Solve for x
    x = 356,642,050.68/21,470.40
  6. Step 6: Final answer
    x = 16,610.87

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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.