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Finding the Fourth Proportional to 28,641.60, 42,958.62 and 11,102.40

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Solution

The fourth proportional to 28,641.60, 42,958.62 and 11,102.40 is: 16,652.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.60 : 42,958.62 = 11,102.40 : x
  2. Step 2: Convert to fraction form
    28,641.60/42,958.62 = 11,102.40/x
  3. Step 3: Cross multiply
    28,641.60x = 42,958.62 × 11,102.40
  4. Step 4: Simplify right side
    28,641.60x = 476,943,782.69
  5. Step 5: Solve for x
    x = 476,943,782.69/28,641.60
  6. Step 6: Final answer
    x = 16,652.13

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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.