Home / 13,688.92-18,889.57-7,722.06

Finding the Fourth Proportional to 13,688.92, 18,889.57 and 7,722.06

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Solution

The fourth proportional to 13,688.92, 18,889.57 and 7,722.06 is: 10,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.92 : 18,889.57 = 7,722.06 : x
  2. Step 2: Convert to fraction form
    13,688.92/18,889.57 = 7,722.06/x
  3. Step 3: Cross multiply
    13,688.92x = 18,889.57 × 7,722.06
  4. Step 4: Simplify right side
    13,688.92x = 145,866,392.91
  5. Step 5: Solve for x
    x = 145,866,392.91/13,688.92
  6. Step 6: Final answer
    x = 10,655.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.