Home / 13,685.94-18,888.29-7,717.50

Finding the Fourth Proportional to 13,685.94, 18,888.29 and 7,717.50

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Solution

The fourth proportional to 13,685.94, 18,888.29 and 7,717.50 is: 10,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.94 : 18,888.29 = 7,717.50 : x
  2. Step 2: Convert to fraction form
    13,685.94/18,888.29 = 7,717.50/x
  3. Step 3: Cross multiply
    13,685.94x = 18,888.29 × 7,717.50
  4. Step 4: Simplify right side
    13,685.94x = 145,770,339.49
  5. Step 5: Solve for x
    x = 145,770,339.49/13,685.94
  6. Step 6: Final answer
    x = 10,651.10

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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.