Home / 12,912.10-19,368.15-9,412.90

Finding the Fourth Proportional to 12,912.10, 19,368.15 and 9,412.90

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Solution

The fourth proportional to 12,912.10, 19,368.15 and 9,412.90 is: 14,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.10 : 19,368.15 = 9,412.90 : x
  2. Step 2: Convert to fraction form
    12,912.10/19,368.15 = 9,412.90/x
  3. Step 3: Cross multiply
    12,912.10x = 19,368.15 × 9,412.90
  4. Step 4: Simplify right side
    12,912.10x = 182,310,459.14
  5. Step 5: Solve for x
    x = 182,310,459.14/12,912.10
  6. Step 6: Final answer
    x = 14,119.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.