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Finding the Fourth Proportional to 15,653.60, 21,602.49 and 8,580.02

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Solution

The fourth proportional to 15,653.60, 21,602.49 and 8,580.02 is: 11,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.60 : 21,602.49 = 8,580.02 : x
  2. Step 2: Convert to fraction form
    15,653.60/21,602.49 = 8,580.02/x
  3. Step 3: Cross multiply
    15,653.60x = 21,602.49 × 8,580.02
  4. Step 4: Simplify right side
    15,653.60x = 185,349,796.25
  5. Step 5: Solve for x
    x = 185,349,796.25/15,653.60
  6. Step 6: Final answer
    x = 11,840.71

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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.