Home / 12,139.96-18,215.90-4,349.40

Finding the Fourth Proportional to 12,139.96, 18,215.90 and 4,349.40

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Solution

The fourth proportional to 12,139.96, 18,215.90 and 4,349.40 is: 6,526.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.96 : 18,215.90 = 4,349.40 : x
  2. Step 2: Convert to fraction form
    12,139.96/18,215.90 = 4,349.40/x
  3. Step 3: Cross multiply
    12,139.96x = 18,215.90 × 4,349.40
  4. Step 4: Simplify right side
    12,139.96x = 79,228,235.46
  5. Step 5: Solve for x
    x = 79,228,235.46/12,139.96
  6. Step 6: Final answer
    x = 6,526.24

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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.