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Finding the Fourth Proportional to 13,779.64, 19,020.18 and 13,074.34

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Solution

The fourth proportional to 13,779.64, 19,020.18 and 13,074.34 is: 18,046.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.64 : 19,020.18 = 13,074.34 : x
  2. Step 2: Convert to fraction form
    13,779.64/19,020.18 = 13,074.34/x
  3. Step 3: Cross multiply
    13,779.64x = 19,020.18 × 13,074.34
  4. Step 4: Simplify right side
    13,779.64x = 248,676,300.18
  5. Step 5: Solve for x
    x = 248,676,300.18/13,779.64
  6. Step 6: Final answer
    x = 18,046.65

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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.