Home / 12,971.40-19,457.10-4,206.20

Finding the Fourth Proportional to 12,971.40, 19,457.10 and 4,206.20

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Solution

The fourth proportional to 12,971.40, 19,457.10 and 4,206.20 is: 6,309.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.40 : 19,457.10 = 4,206.20 : x
  2. Step 2: Convert to fraction form
    12,971.40/19,457.10 = 4,206.20/x
  3. Step 3: Cross multiply
    12,971.40x = 19,457.10 × 4,206.20
  4. Step 4: Simplify right side
    12,971.40x = 81,840,454.02
  5. Step 5: Solve for x
    x = 81,840,454.02/12,971.40
  6. Step 6: Final answer
    x = 6,309.30

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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.