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Finding the Fourth Proportional to 28,667.88, 42,985.11 and 11,117.22

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Solution

The fourth proportional to 28,667.88, 42,985.11 and 11,117.22 is: 16,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,667.88 : 42,985.11 = 11,117.22 : x
  2. Step 2: Convert to fraction form
    28,667.88/42,985.11 = 11,117.22/x
  3. Step 3: Cross multiply
    28,667.88x = 42,985.11 × 11,117.22
  4. Step 4: Simplify right side
    28,667.88x = 477,874,924.59
  5. Step 5: Solve for x
    x = 477,874,924.59/28,667.88
  6. Step 6: Final answer
    x = 16,669.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.