Home / 13,639.98-20,460.40-3,779.34

Finding the Fourth Proportional to 13,639.98, 20,460.40 and 3,779.34

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Solution

The fourth proportional to 13,639.98, 20,460.40 and 3,779.34 is: 5,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.98 : 20,460.40 = 3,779.34 : x
  2. Step 2: Convert to fraction form
    13,639.98/20,460.40 = 3,779.34/x
  3. Step 3: Cross multiply
    13,639.98x = 20,460.40 × 3,779.34
  4. Step 4: Simplify right side
    13,639.98x = 77,326,808.14
  5. Step 5: Solve for x
    x = 77,326,808.14/13,639.98
  6. Step 6: Final answer
    x = 5,669.13

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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.