Home / 13,758.16-18,985.74-7,788.64

Finding the Fourth Proportional to 13,758.16, 18,985.74 and 7,788.64

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Solution

The fourth proportional to 13,758.16, 18,985.74 and 7,788.64 is: 10,748.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.16 : 18,985.74 = 7,788.64 : x
  2. Step 2: Convert to fraction form
    13,758.16/18,985.74 = 7,788.64/x
  3. Step 3: Cross multiply
    13,758.16x = 18,985.74 × 7,788.64
  4. Step 4: Simplify right side
    13,758.16x = 147,873,093.99
  5. Step 5: Solve for x
    x = 147,873,093.99/13,758.16
  6. Step 6: Final answer
    x = 10,748.03

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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.