Home / 13,689.94-18,890.98-7,723.07

Finding the Fourth Proportional to 13,689.94, 18,890.98 and 7,723.07

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Solution

The fourth proportional to 13,689.94, 18,890.98 and 7,723.07 is: 10,657.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.94 : 18,890.98 = 7,723.07 : x
  2. Step 2: Convert to fraction form
    13,689.94/18,890.98 = 7,723.07/x
  3. Step 3: Cross multiply
    13,689.94x = 18,890.98 × 7,723.07
  4. Step 4: Simplify right side
    13,689.94x = 145,896,360.91
  5. Step 5: Solve for x
    x = 145,896,360.91/13,689.94
  6. Step 6: Final answer
    x = 10,657.20

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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.