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Finding the Fourth Proportional to 15,641.51, 21,584.48 and 8,567.78

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Solution

The fourth proportional to 15,641.51, 21,584.48 and 8,567.78 is: 11,823.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,641.51 : 21,584.48 = 8,567.78 : x
  2. Step 2: Convert to fraction form
    15,641.51/21,584.48 = 8,567.78/x
  3. Step 3: Cross multiply
    15,641.51x = 21,584.48 × 8,567.78
  4. Step 4: Simplify right side
    15,641.51x = 184,930,925.29
  5. Step 5: Solve for x
    x = 184,930,925.29/15,641.51
  6. Step 6: Final answer
    x = 11,823.09

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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.