Home / 12,991.13-19,487.70-4,672.22

Finding the Fourth Proportional to 12,991.13, 19,487.70 and 4,672.22

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Solution

The fourth proportional to 12,991.13, 19,487.70 and 4,672.22 is: 7,008.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.13 : 19,487.70 = 4,672.22 : x
  2. Step 2: Convert to fraction form
    12,991.13/19,487.70 = 4,672.22/x
  3. Step 3: Cross multiply
    12,991.13x = 19,487.70 × 4,672.22
  4. Step 4: Simplify right side
    12,991.13x = 91,050,870.41
  5. Step 5: Solve for x
    x = 91,050,870.41/12,991.13
  6. Step 6: Final answer
    x = 7,008.70

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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.