Home / 13,381.26-18,465.30-7,715.72

Finding the Fourth Proportional to 13,381.26, 18,465.30 and 7,715.72

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Solution

The fourth proportional to 13,381.26, 18,465.30 and 7,715.72 is: 10,647.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.26 : 18,465.30 = 7,715.72 : x
  2. Step 2: Convert to fraction form
    13,381.26/18,465.30 = 7,715.72/x
  3. Step 3: Cross multiply
    13,381.26x = 18,465.30 × 7,715.72
  4. Step 4: Simplify right side
    13,381.26x = 142,473,084.52
  5. Step 5: Solve for x
    x = 142,473,084.52/13,381.26
  6. Step 6: Final answer
    x = 10,647.21

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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.