Home / 12,904.40-19,354.80-4,140.20

Finding the Fourth Proportional to 12,904.40, 19,354.80 and 4,140.20

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Solution

The fourth proportional to 12,904.40, 19,354.80 and 4,140.20 is: 6,209.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.40 : 19,354.80 = 4,140.20 : x
  2. Step 2: Convert to fraction form
    12,904.40/19,354.80 = 4,140.20/x
  3. Step 3: Cross multiply
    12,904.40x = 19,354.80 × 4,140.20
  4. Step 4: Simplify right side
    12,904.40x = 80,132,742.96
  5. Step 5: Solve for x
    x = 80,132,742.96/12,904.40
  6. Step 6: Final answer
    x = 6,209.72

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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.