Home / 13,719.12-18,931.96-7,669.21

Finding the Fourth Proportional to 13,719.12, 18,931.96 and 7,669.21

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Solution

The fourth proportional to 13,719.12, 18,931.96 and 7,669.21 is: 10,583.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.12 : 18,931.96 = 7,669.21 : x
  2. Step 2: Convert to fraction form
    13,719.12/18,931.96 = 7,669.21/x
  3. Step 3: Cross multiply
    13,719.12x = 18,931.96 × 7,669.21
  4. Step 4: Simplify right side
    13,719.12x = 145,193,176.95
  5. Step 5: Solve for x
    x = 145,193,176.95/13,719.12
  6. Step 6: Final answer
    x = 10,583.27

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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.