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Finding the Fourth Proportional to 15,605.78, 21,535.86 and 8,532.08

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Solution

The fourth proportional to 15,605.78, 21,535.86 and 8,532.08 is: 11,774.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.78 : 21,535.86 = 8,532.08 : x
  2. Step 2: Convert to fraction form
    15,605.78/21,535.86 = 8,532.08/x
  3. Step 3: Cross multiply
    15,605.78x = 21,535.86 × 8,532.08
  4. Step 4: Simplify right side
    15,605.78x = 183,745,680.39
  5. Step 5: Solve for x
    x = 183,745,680.39/15,605.78
  6. Step 6: Final answer
    x = 11,774.21

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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.