Home / 13,319.98-18,381.09-7,578.04

Finding the Fourth Proportional to 13,319.98, 18,381.09 and 7,578.04

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Solution

The fourth proportional to 13,319.98, 18,381.09 and 7,578.04 is: 10,457.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.98 : 18,381.09 = 7,578.04 : x
  2. Step 2: Convert to fraction form
    13,319.98/18,381.09 = 7,578.04/x
  3. Step 3: Cross multiply
    13,319.98x = 18,381.09 × 7,578.04
  4. Step 4: Simplify right side
    13,319.98x = 139,292,635.26
  5. Step 5: Solve for x
    x = 139,292,635.26/13,319.98
  6. Step 6: Final answer
    x = 10,457.42

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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.