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Finding the Fourth Proportional to 13,750.58, 18,980.61 and 8,445.89

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Solution

The fourth proportional to 13,750.58, 18,980.61 and 8,445.89 is: 11,658.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.58 : 18,980.61 = 8,445.89 : x
  2. Step 2: Convert to fraction form
    13,750.58/18,980.61 = 8,445.89/x
  3. Step 3: Cross multiply
    13,750.58x = 18,980.61 × 8,445.89
  4. Step 4: Simplify right side
    13,750.58x = 160,308,144.19
  5. Step 5: Solve for x
    x = 160,308,144.19/13,750.58
  6. Step 6: Final answer
    x = 11,658.28

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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.