Home / 12,779.93-19,172.65-5,380.12

Finding the Fourth Proportional to 12,779.93, 19,172.65 and 5,380.12

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Solution

The fourth proportional to 12,779.93, 19,172.65 and 5,380.12 is: 8,071.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.93 : 19,172.65 = 5,380.12 : x
  2. Step 2: Convert to fraction form
    12,779.93/19,172.65 = 5,380.12/x
  3. Step 3: Cross multiply
    12,779.93x = 19,172.65 × 5,380.12
  4. Step 4: Simplify right side
    12,779.93x = 103,151,178.32
  5. Step 5: Solve for x
    x = 103,151,178.32/12,779.93
  6. Step 6: Final answer
    x = 8,071.34

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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.