Home / 12,971.80-19,457.70-4,207.60

Finding the Fourth Proportional to 12,971.80, 19,457.70 and 4,207.60

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Solution

The fourth proportional to 12,971.80, 19,457.70 and 4,207.60 is: 6,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.80 : 19,457.70 = 4,207.60 : x
  2. Step 2: Convert to fraction form
    12,971.80/19,457.70 = 4,207.60/x
  3. Step 3: Cross multiply
    12,971.80x = 19,457.70 × 4,207.60
  4. Step 4: Simplify right side
    12,971.80x = 81,870,218.52
  5. Step 5: Solve for x
    x = 81,870,218.52/12,971.80
  6. Step 6: Final answer
    x = 6,311.40

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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.