Home / 12,971.97-19,439.70-7,416.99

Finding the Fourth Proportional to 12,971.97, 19,439.70 and 7,416.99

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Solution

The fourth proportional to 12,971.97, 19,439.70 and 7,416.99 is: 11,115.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.97 : 19,439.70 = 7,416.99 : x
  2. Step 2: Convert to fraction form
    12,971.97/19,439.70 = 7,416.99/x
  3. Step 3: Cross multiply
    12,971.97x = 19,439.70 × 7,416.99
  4. Step 4: Simplify right side
    12,971.97x = 144,184,060.50
  5. Step 5: Solve for x
    x = 144,184,060.50/12,971.97
  6. Step 6: Final answer
    x = 11,115.05

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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.