Home / 15,653.36-21,601.40-8,579.79

Finding the Fourth Proportional to 15,653.36, 21,601.40 and 8,579.79

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Solution

The fourth proportional to 15,653.36, 21,601.40 and 8,579.79 is: 11,839.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.36 : 21,601.40 = 8,579.79 : x
  2. Step 2: Convert to fraction form
    15,653.36/21,601.40 = 8,579.79/x
  3. Step 3: Cross multiply
    15,653.36x = 21,601.40 × 8,579.79
  4. Step 4: Simplify right side
    15,653.36x = 185,335,432.81
  5. Step 5: Solve for x
    x = 185,335,432.81/15,653.36
  6. Step 6: Final answer
    x = 11,839.98

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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.