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Finding the Fourth Proportional to 15,653.94, 21,601.94 and 8,580.21

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Solution

The fourth proportional to 15,653.94, 21,601.94 and 8,580.21 is: 11,840.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.94 : 21,601.94 = 8,580.21 : x
  2. Step 2: Convert to fraction form
    15,653.94/21,601.94 = 8,580.21/x
  3. Step 3: Cross multiply
    15,653.94x = 21,601.94 × 8,580.21
  4. Step 4: Simplify right side
    15,653.94x = 185,349,138.71
  5. Step 5: Solve for x
    x = 185,349,138.71/15,653.94
  6. Step 6: Final answer
    x = 11,840.41

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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.