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Finding the Fourth Proportional to 12,713.81, 19,070.72 and 3,479.81

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Solution

The fourth proportional to 12,713.81, 19,070.72 and 3,479.81 is: 5,219.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,713.81 : 19,070.72 = 3,479.81 : x
  2. Step 2: Convert to fraction form
    12,713.81/19,070.72 = 3,479.81/x
  3. Step 3: Cross multiply
    12,713.81x = 19,070.72 × 3,479.81
  4. Step 4: Simplify right side
    12,713.81x = 66,362,482.16
  5. Step 5: Solve for x
    x = 66,362,482.16/12,713.81
  6. Step 6: Final answer
    x = 5,219.72

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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.